Silencer Results

Results

We are testing in accordance with MIL-STD-1474D using calibrated military-approved equipment and provide these or unweighted results. Measurement equipment includes calibrated Brüel & Kjær model 2209 Impulse Precision Sound Level Meter with 20 μs rise time using GRAS pressure measurement microphone model 40BP (Bruel & Kjaer model 4136 equivalent) while positioned one meter left and level with muzzle, oriented upward, and 1.6 meters above dirt/grass. Digital samples are taken from AC output signal path by M-Audio Solo at 10.4 μs intervals (96,000 per second) and 24 bit resolution (16.7 million possible steps). Recording hardware rise-time has been estimated at (using the 0.35/BW formula) 8.75 microseconds while the microphone is estimated to have a rise-time of 5.0 microseconds. Total system calibration during each use with Brüel & Kjær model 4220 Pistonphone. Sound analysis is linear to better correlate with perception. Linear measurement results in higher levels than "A" weighing and this data should not be compared to MIL-STD data. Temperature and humidity measurements by Kestrel meters. Silencers will be examined for evidence of artificial environments. If present, this will be noted unless the medium can be removed.

Please see Testing Method for a more complete description as well as a link to the previous method last used on May 6th, 2005.

You may click on the top of any column to sort the data by that field. You may click on the model name for a detailed review.

.22lr unweighted

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

SWR Warlock 0.00 0.00 0 0.0 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 117.7 43.0 3.8 0.0 0.0

AAC Pilot 5.04 1.00 4 3.0 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 119.8 40.9 7.2 10.3 13.6

Gemtech Outback II 0.00 0.00 0 0.0 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 120.8 40.0 7.6 0.0 0.0

SRT Arms Cheyenne XL 0.00 0.00 0 0.0 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 123.0 37.8 5.5 0.0 0.0

SRT Arms Apache 0.00 0.00 0 0.0 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 123.0 37.7 7.2 0.0 0.0

SRT Arms Cheyenne 0.00 0.00 0 0.0 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 123.2 37.6 9.2 0.0 0.0

Tac-Inv Tac65 $229.99 5.97 1.09 5.6 4.2 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 124.9 35.9 6.7 6.4 8.5 Disassembles

Tac-Inv Tac67 $359.99 5.97 1.08 5.5 9.5 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 125.1 35.6 11.4 6.5 3.7 Full auto rated, stainless baffles, disassembles.

SRT Arms Odessa $285.00 3.93 1.00 3.1 3.0 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 127.7 33.0 9.7 10.7 11.0 Shortest testest this session.

Tac-Inv Tac52 $244.99 5.20 1.09 4.9 3.7 0.00 60 50 29.50 2005-04-24 P22 3.5 CCI standard N/A 160.7 128.7 32.1 5.2 6.6 8.7 Disassembles

.308 MIL-STD-1474D

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

SoundTech AWS $1150.00 22.50 1.38 33.7 45.0 0.00 74 56 29.80 2005-06-04 AWS 16.0 M80TZ N/A 169.8 138.6 31.2 2.9 0.9 0.7 Needs AI barrel.

SoundTech Black Star $685.00 9.38 1.63 19.6 30.5 0.37 74 56 29.80 2005-06-04 M700 19.5 M80TZ N/A 169.4 139.9 29.5 2.9 1.5 1.0

SRT Shadow $625.00 8.13 1.50 14.4 27.8 0.38 74 56 29.80 2005-06-04 M700 19.5 M80TZ N/A 169.4 141.2 28.1 -0.1 2.0 1.0 Shortest

Ops Inc. 3rd model 11.88 1.50 21 27.8 0.35 74 56 29.80 2005-06-04 M700 19.5 M80TZ N/A 169.4 141.4 28.0 1.8 1.3 1.0 Needs special barrel profile.

AWC Thundertrap 8.75 1.63 18.3 36.5 0.35 74 56 29.80 2005-06-04 SSG-PIIK 20.0 M80TZ N/A 168.3 141.7 26.6 3.1 1.5 0.7

AAC Cyclone $650.00 8.25 1.50 14.6 30.5 0.37 74 56 29.80 2005-06-04 SSG-PIIK 20.0 M80TZ N/A 168.3 141.8 26.5 2.6 1.8 0.9 All welded.

Gemtech TPR-S 9.25 1.51 16.6 41.5 0.36 74 56 29.80 2005-06-04 M700 19.5 M80TZ N/A 169.4 142.1 27.2 3.1 1.6 0.7 Bilock

SWR Omega 30 8.75 1.50 15.5 27.6 0.39 74 56 29.80 2005-06-04 M700 19.5 M80TZ N/A 169.4 142.6 26.8 4.3 1.7 1.0

Fisher Enterprises DC $850.00 11.20 1.50 19.8 36.5 0.41 74 56 29.80 2005-06-04 M700 19.5 M80TZ N/A 169.4 145.6 23.7 6.5 1.2 0.6 Connects onto Vortex.

Jet 0.308 $950.00 9.00 1.49 15.7 20.4 0.35 74 56 29.80 2005-06-04 M700 19.5 M80TZ N/A 169.4 149.7 19.7 3.2 1.3 1.0 Lightest

.308 subsonic MIL-ST

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

SoundTech AWS $1150.00 22.50 1.38 33.7 45.0 0.00 74 56 29.80 2005-06-04 AWS 16.0 EBR Thumper N/A 159.0 121.3 37.7 6.9 1.1 0.8 Needs AI barrel.

SoundTech Black Star $685.00 9.38 1.63 19.6 30.5 0.37 74 56 29.80 2005-06-04 M700 19.5 EBR Thumper N/A 157.3 121.4 35.9 9.5 1.8 1.2

Gemtech TPR-S 9.25 1.51 16.6 41.5 0.36 74 56 29.80 2005-06-04 M700 19.5 EBR Thumper N/A 157.3 123.8 33.5 4.7 2.0 0.8 Bilock

AWC Thundertrap 8.75 1.63 18.3 36.5 0.35 74 56 29.80 2005-06-04 SSG-PIIK 20.0 EBR Thumper N/A 156.8 125.0 31.9 3.9 1.7 0.9

AAC Cyclone $650.00 8.25 1.50 14.6 30.5 0.37 74 56 29.80 2005-06-04 SSG-PIIK 20.0 EBR Thumper N/A 156.8 126.3 30.5 0.2 2.1 1.0 All welded.

SRT Shadow $625.00 8.13 1.50 14.4 27.8 0.38 74 56 29.80 2005-06-04 M700 19.5 EBR Thumper N/A 157.3 127.0 30.3 11.5 2.1 1.1 Shortest

SWR Omega 30 8.75 1.50 15.5 27.6 0.39 74 56 29.80 2005-06-04 M700 19.5 EBR Thumper N/A 157.3 127.7 29.6 1.9 1.9 1.1

Jet 0.308 $950.00 9.00 1.49 15.7 20.4 0.35 74 56 29.80 2005-06-04 M700 19.5 EBR Thumper N/A 157.3 132.4 24.9 7.9 1.6 1.2 Lightest

Ops Inc. 3rd model 11.88 1.50 21 27.8 0.35 74 56 29.80 2005-06-04 M700 19.5 EBR Thumper N/A 157.3 133.0 24.3 0.5 1.2 0.9 Needs special barrel profile.

Fisher Enterprises DC $850.00 11.20 1.50 19.8 36.5 0.41 74 56 29.80 2005-06-04 M700 19.5 EBR Thumper N/A 157.3 137.1 20.2 7.2 1.0 0.6 Connects onto Vortex.

.45 SMG MIL-STD-1474

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

Vector 45 $475.00 12.69 1.58 24.8 30.3 0.00 69 48 29.90 2005-11-01 UZI 0.0 American Eagle 230 N/A 0.0 135.8 0.0 N/A 0.0 0.0

40 S&W MIL-STD-1474D

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

Gemtech Raptor-40 9.00 1.50 15.9 11.6 0.47 88 36 29.90 2005-06-08 MP5/40 8.8 Ranger-SXT 180 N/A 156.8 125.9 30.9 6.9 1.9 2.7 3-lug.

5.45mm MIL-STD-1474D

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

AAC Krinkov $595.00 8.75 1.50 15.5 18.7 0.28 88 36 29.90 2005-06-08 AK-74 16.3 Wolf HP N/A 164.2 0.0 0.0 N/A 0.0 0.0 Barrel threads not aligned. Unsuppressed had no muzzle brake.

AAC Krinkov $595.00 8.75 1.50 15.5 18.7 0.28 88 36 29.90 2005-06-08 AKS-74U 8.3 Wolf HP N/A 167.9 144.5 23.4 -1.2 1.5 1.3 Unsuppressed had no muzzle brake.

5.56mm MIL-STD-1474D

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

SoundTech M4-Wartech $585.00 8.00 1.50 14.1 0.0 0.00 84 67 0.00 2005-06-11 M700 20.0 Imported M193 N/A 165.1 130.6 34.5 0.5 2.4 0.0 8 inch can, Tested in GA.

Gemtech M4-96D $799.00 7.75 1.50 13.7 25.7 0.28 58 85 29.90 2005-06-18 M4 14.5 Win Q3131A M193 N/A 166.1 133.1 33.0 0.9 2.4 1.3

YHM 3100-A $535.00 6.62 1.62 13.7 25.0 0.30 54 81 29.90 2006-01-13 M4 14.5 Win Q3131 M193 N/A 165.3 134.0 31.3 1.2 2.3 1.3 Fast attach, weight includes net flash hider vs. A2.

AAC M4-2000 SOPMOD $695.00 7.25 1.50 12.8 23.7 0.28 58 85 29.90 2005-06-18 M4 14.5 Win Q3131A M193 N/A 166.1 134.3 31.9 2.7 2.5 1.3 Flash suppressor also works with KAC-M4QD

Gemtech M4-96D $799.00 7.75 1.50 13.7 25.5 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 134.4 30.4 0.7 2.2 1.2 Fast attach, BiLock.

HTG ARIS $576.00 6.00 1.50 10.6 19.0 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 135.1 29.7 5.5 2.8 1.6 Thead mount.

SWR SpecWar2 7.88 1.50 13.9 27.3 0.00 77 48 29.70 2005-05-28 M4 14.5 Win Q3131 M193 N/A 167.2 135.2 32.0 1.5 2.3 1.2

SWR SpecWar1 6.62 1.50 11.7 22.2 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 135.2 29.6 4.3 2.5 1.3 Thead mount.

KAC M4-QD $1200.00 6.38 1.52 11.6 22.0 0.30 54 81 29.90 2006-01-13 M4 14.5 Win Q3131 M193 N/A 165.3 135.4 29.9 -1.2 2.6 1.4 Fast attach. Weight includes net flash hider vs. A2.

KAC M4-QD $1200.00 6.38 1.52 11.6 22.5 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 135.6 29.3 2.5 2.5 1.3 Fast attach.

AAC M4-2000 $695.00 7.31 1.50 12.9 21.5 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 135.8 29.1 1.4 2.3 1.4 Fast attach.

SWR SpecWar2 7.88 1.50 13.9 27.3 0.00 58 85 29.90 2005-06-18 M4 14.5 Win Q3131A M193 N/A 166.1 135.9 30.2 -0.7 2.2 1.1

SoundTech M4-Wartech $585.00 6.94 1.50 12.3 21.2 0.27 77 48 29.70 2005-05-28 M4 14.5 Win Q3131 M193 N/A 167.2 136.0 31.2 5.6 2.5 1.5 2209 meter

SWR SpecWar2 7.88 1.50 13.9 27.3 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 136.0 28.8 0.1 2.1 1.1 Fast attach, BiLock.

AAC Omni $695.00 7.00 1.50 12.4 20.2 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 136.1 28.7 1.2 2.3 1.4 Works on A2 flash hider. One piece.

SoundTech M4-Wartech $585.00 6.88 1.50 12.2 21.2 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 136.3 28.6 2.9 2.4 1.3 Thead mount.

Gemtech HALO $675.00 7.75 1.50 13.7 25.0 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 136.9 27.9 3.3 2.0 1.1 Works on A2 flash hider. Two piece.

SoundTech M4-Wartech $585.00 6.94 1.50 12.3 21.2 0.27 58 85 29.90 2005-06-18 M4 14.5 Win Q3131A M193 N/A 166.1 136.9 29.2 4.4 2.4 1.4

KAC M4-QD $1200.00 6.50 1.51 11.6 22.3 0.30 58 85 29.90 2005-06-18 M4 14.5 Win Q3131A M193 N/A 166.1 137.0 29.2 5 2.5 1.3

SureFire FA556A $1200.00 7.62 1.50 13.5 19.6 0.27 54 81 29.90 2006-01-13 M4 14.5 Win Q3131 M193 N/A 165.3 137.4 27.9 0.4 2.1 1.4 Sound was 137.3 dB at right ear. Fast attach. Weight includes net flash hider vs. A2.

Tac-Inv Tac16 $374.99 6.63 1.63 13.8 23.7 0.30 58 85 29.90 2005-06-18 M4 14.5 Win Q3131A M193 N/A 166.1 137.7 28.4 3.9 2.1 1.2

SWR Wolverine 5.75 1.50 10.2 20.0 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 137.9 26.9 -0.3 2.6 1.3 Thread mount.

Gemtech M4-02 $495.00 6.19 1.38 9.3 17.8 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 138.8 26.1 4.2 2.8 1.5 Thead mount.

AAC Ranger $595.00 6.25 1.50 11 19.4 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 138.8 26.0 2.3 2.4 1.3 Thead mount.

HTG Eureka $548.00 4.62 1.50 8.2 15.0 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 139.9 24.9 2.4 3.0 1.7 Thead mount.

AAC SCAR-SD $995.00 5.88 1.50 10.4 17.6 0.29 54 81 29.90 2006-01-13 M4 14.5 Win Q3131 M193 N/A 165.3 141.4 24.0 3.3 2.3 1.4 Sound was 137.9 dB at right ear. Fast attach. Weight includes net flash hider vs. A2.

HTG Universal $477.00 5.62 1.00 4.4 8.2 0.00 69 48 29.90 2005-11-01 M4 14.5 Win Q3131 M193 N/A 164.8 144.2 20.6 -0.1 4.7 2.5 .22lr/.223 dual use. Thread mount.

5.56mm unweighted

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

SoundTech M4-Wartech $585.00 6.94 1.50 12.3 21.2 0.27 60 42 29.88 2005-05-14 M4 14.5 Win Q3131 M193 N/A 166.5 137.7 27.8 4.8 2.3 1.3 B+K 2209 meter, linear setting.

AAC M4-2000 $695.00 7.25 1.50 12.8 23.7 0.28 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 138.8 29.5 -0.9 2.3 1.2 Quick release

Gemtech M4-96D $799.00 7.75 1.50 13.7 25.7 0.28 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 138.9 29.4 1.5 2.1 1.1 Bi-Lock mount

SoundTech M4-Wartech $585.00 6.94 1.50 12.3 21.2 0.27 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 140.6 27.7 3.2 2.3 1.3

SoundTech M4-Wartech $585.00 6.94 1.50 12.3 21.2 0.27 77 48 29.70 2005-05-28 M4 14.5 Win Q3131 M193 N/A 167.8 141.3 26.5 1.9 2.2 1.3 2209 meter

SRT Arms Hurricane $545.00 6.25 1.50 11 22.5 0.29 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 141.6 26.7 4 2.4 1.2

SoundTech Fatboy $585.00 6.13 2.00 19.3 30.5 0.26 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 141.9 26.4 7.6 1.4 0.9

SWR SpecWar2 7.88 1.50 13.9 27.3 0.00 77 48 29.70 2005-05-28 M4 14.5 Win Q3131 M193 N/A 167.8 142.0 25.8 3.6 1.9 0.9 2209 meter

KAC M4QD $1200.00 6.50 1.51 11.6 22.3 0.30 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 142.5 25.8 -0.6 2.2 1.2

AWC Optima 8.50 1.63 17.7 30.8 0.30 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 142.6 25.7 3.4 1.5 0.8 Not in catalog.

Gemtech M4-96C 6.19 1.50 10.9 18.2 0.28 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 142.8 25.5 1.1 2.3 1.4 Thread mount.

SWR Wolverine 5.76 1.50 10.2 20.0 0.30 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 142.8 25.5 2 2.5 1.3 Thread mount.

SWR Wolverine 7.13 1.50 12.6 23.5 0.30 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 143.1 25.2 3.9 2.0 1.1 AAC mount.

Gemtech HALO $675.00 7.81 1.50 13.8 25.1 0.29 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 143.7 24.6 3.7 1.8 1.0 Mounts to standard flash-hider.

AAC SCARS-D 5.88 1.50 10.4 19.5 0.28 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 147.6 20.7 1.2 2.0 1.1 Prototype.

Tac-Inv Tac16 $374.99 6.63 1.63 13.8 23.7 0.30 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 147.6 20.7 3.6 1.5 0.9 Disassembles.

American Manufacturing XXX Warrior $429.00 8.25 1.62 17 27.2 0.39 55 49 30.35 2005-05-06 M4 14.5 Win Q3131 M193 N/A 168.3 148.4 18.9 1.4 1.1 0.7 Overbored for 9mm.

9mm MIL-STD-1474D

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 84 67 0.00 2005-06-11 P226R 4.4 UMC 147 N/A 160.3 126.7 33.6 6 3.5 3.6 Tested in GA.

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 59 26 30.21 2005-05-13 G17 4.9 UMC 147 N/A 161.7 131.5 30.2 3.3 3.2 3.2 2209 meter, 4136 mic

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 161.5 131.9 29.6 5.6 3.1 3.2 2209 meter

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 84 67 0.00 2005-06-11 Taurus 4.9 UMC 147 N/A 160.1 135.2 24.9 4.8 2.6 2.9 Tested in GA. Had some grease in it.

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 Special-K N/A 160.3 136.8 23.5 4.8 2.4 2.7 2209 meter

Gemtech Trinity $630.00 8.00 1.25 9.8 8.7 0.40 59 26 30.21 2005-05-13 G17 4.9 UMC 147 N/A 161.7 137.7 24.0 1.7 2.5 2.8 2209 meter, 4136 mic

Gemtech Trinity $630.00 8.00 1.25 9.8 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 161.5 138.5 23.1 1.4 2.4 2.7 2209 meter

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 161.5 140.2 21.3 4.3 2.2 2.4 2209 meter

9mm SMG MIL-STD-1474

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

AAC Avenger 11.44 1.38 17 13.2 0.00 69 48 29.90 2005-11-01 UZI 0.0 UMC 147 N/A 0.0 125.1 0.0 N/A 0.0 0.0

Vector 45 $475.00 12.69 1.58 24.8 30.3 0.00 69 48 29.90 2005-11-01 UZI 0.0 UMC 147 N/A 0.0 135.0 0.0 N/A 0.0 0.0 This is a .45 ACP bore can.

9mm SMG unweighted

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

AAC Striker-2 $650.00 7.75 1.25 9.5 7.2 0.41 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 0.0 0.0 0.0 N/A 0.0 0.0 Forgot to test. Will be included in followup.

HK Navy 0.00 0.00 0 0.0 0.00 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 0.0 0.0 0.0 N/A 0.0 0.0

KAC SD $975.00 11.75 1.36 17.1 21.4 0.40 55 49 30.35 2005-05-06 MP5SD 5.7 IMI 115 N/A 0.0 123.6 0.0 4.7 0.0 0.0

KAC Navy $975.00 7.75 1.37 11.4 14.8 0.41 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 161.4 127.1 34.4 4.5 3.0 2.3 1/2-32 threads

AWC Mk9A 11.25 1.99 35 26.6 0.45 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 161.4 128.8 32.7 2.2 0.9 1.2 Bixler/SCRC patented 3-lug mount.

HK MP5SD 11.88 1.58 23.3 18.1 0.39 55 49 30.35 2005-05-06 MP5SD 5.7 IMI 115 N/A 0.0 129.8 0.0 0.5 0.0 0.0

SWR QD3K 8.63 1.38 12.9 9.0 0.43 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 161.4 130.7 30.8 7.1 2.4 3.4 Latka 3-lug mount

Gemtech Raptor 9 $635.00 9.00 1.38 13.5 9.9 0.43 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 161.4 131.9 29.6 -0.3 2.2 3.0 Latka 3-lug mount

AWC Tac-9 9.56 1.38 14.3 24.4 0.39 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 161.4 141.6 19.8 2.4 1.4 0.8 Bixler/SCRC patented 3-lug mount.

TROS Nemesis-9 $595.00 9.25 1.38 13.8 10.6 0.42 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 161.4 145.7 15.7 1 1.1 1.5 Latka 3-lug mount

9mm unweighted

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 59 26 30.21 2005-05-13 G17 4.9 UMC 147 N/A 162.9 131.1 31.8 2.6 3.3 3.4 2209 meter, 4136 mic, Linear.

SWR Omega-9 8.13 1.38 12.2 8.8 0.43 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 131.5 31.8 7.3 2.6 3.6 Did not cycle G17 well.

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 55 49 30.35 2005-05-06 USP9 SD 4.7 UMC 147 N/A 163.5 131.7 31.8 4.1 3.3 3.4 Dry

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 132.4 31.0 1 3.3 3.3 Dry

B&T SD USP9 7.88 1.38 11.8 15.0 0.43 55 49 30.35 2005-05-06 USP9 SD 4.7 UMC 147 N/A 163.5 133.2 30.2 6.7 2.6 2.0

CCF Impuls-IIa $750.00 7.75 1.38 11.6 15.1 0.43 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.5 133.6 29.9 8.4 2.6 2.0

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 162.7 137.2 25.5 4.3 2.7 2.7 2209 meter

AWC HP9 5.36 1.44 8.7 6.9 0.51 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 139.0 24.4 -0.7 2.8 3.5 Uses wipes, no Nielsen, jammed G17.

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 84 67 0.00 2005-06-11 Taurus 4.9 UMC 147 N/A 160.7 140.5 20.3 3.5 2.1 2.3 2209 meter, tested in GA. Had some grease.

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 Special-K N/A 161.4 140.9 20.5 4.5 2.1 2.4 2209 meter

Gemtech Trinity $630.00 8.00 1.25 9.8 8.7 0.40 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 141.8 21.6 3.1 2.2 2.5 Dry

Gemtech Trinity $630.00 8.00 1.25 9.8 8.7 0.40 59 26 30.21 2005-05-13 G17 4.9 UMC 147 N/A 162.9 142.1 20.8 0.9 2.1 2.4 2209 meter, 4136 mic, Linear.

Gemtech Vortex-9 7.31 1.26 9.1 6.2 0.41 55 49 30.35 2005-05-06 MP5N 8.8 UMC 147 N/A 163.3 142.3 21.0 N/A 2.3 3.4 One Shot Only as it has no LID.

Gemtech Trinity $630.00 8.00 1.25 9.8 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 162.7 143.3 19.4 0.2 2.0 2.2 2209 meter

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 143.4 20.0 5.3 2.1 2.3 Excessive grease in Nielsen

CCF Carbon Impuls-Iia $875.00 7.88 1.45 13 12.3 0.49 55 49 30.35 2005-05-06 USP9 SD 4.7 UMC 147 N/A 163.5 143.9 19.5 3.6 1.5 1.6 9/40/45 model with 9mm baffles.

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 162.7 145.5 17.2 2.8 1.8 2.0 2209 meter

AWC Jupiter Eye 7.90 1.35 11.3 14.7 0.39 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 146.2 17.1 2.1 1.5 1.2 Did not cycle G17. Only two shots for this test.

AWC Tac-9 9.19 1.38 13.7 24.0 0.39 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 148.9 14.4 0.5 1.0 0.6 Did not cycle G17 (not supposed to). Two shots only in test.

Gemtech SOS-9 5.08 1.25 6.2 4.2 0.39 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 149.0 14.3 0.2 2.3 3.4

9mm Wet MIL-STD-1474

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

SoundTech 9mm 0.00 0.00 0 0.0 0.00 84 67 0.00 2005-06-11 Taurus 4.9 UMC 147 N/A 160.1 121.6 38.5 -1.2 0.0 0.0 Tested in GA, ultrasound Gel.

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 161.5 123.1 38.5 -3.2 4.0 4.1 2209 meter

Gemtech Trinity $630.00 8.00 1.25 9.8 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 161.5 124.2 37.3 -1.8 3.8 4.3 2209 meter

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 161.5 129.1 32.5 3.2 3.4 3.7 2209 meter

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 Special-K N/A 160.3 129.8 30.5 -1.8 3.2 3.5 2209 meter

9mm Wet unweighted

Manufacturer Model Price Length Diameter Cu. In. Weight (oz) Bore Temp Humidity Pressure Date Weapon Barrel Length Ammunition Velocity (fps) Unsuppressed Suppressed Net First Round dB/ci dB/oz Details

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 122.0 41.7 -1.3 4.4 4.4 Wet, 5cc

CCF Impuls-IIa $750.00 7.75 1.38 11.6 15.1 0.43 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.5 123.5 40.2 -0.1 3.5 2.7 Wet, 5cc

B&T SD USP9 7.88 1.38 11.8 15.0 0.43 55 49 30.35 2005-05-06 USP9 SD 4.7 UMC 147 N/A 163.5 123.6 40.1 -2.8 3.4 2.7 Wet, 5cc

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 55 49 30.35 2005-05-06 USP9 SD 4.7 UMC 147 N/A 163.5 123.9 39.9 2.3 4.2 4.2 Wet, 5cc

AAC Evolution-9 $695.00 7.75 1.25 9.5 9.4 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 162.7 124.8 37.9 -0.3 4.0 4.0 2209 meter

CCF Carbon Impuls-Iia $875.00 7.88 1.45 13 12.3 0.49 55 49 30.35 2005-05-06 USP9 SD 4.7 UMC 147 N/A 163.5 126.9 36.6 2.5 2.8 3.0 Wet, 5cc, 9/40/45 model with 9mm baffles.

Gemtech Trinity $630.00 8.00 1.25 9.8 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 162.7 129.2 33.5 3.3 3.4 3.9 2209 meter

Gemtech Trinity $630.00 8.00 1.25 9.8 8.7 0.40 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 131.7 31.6 -7.2 3.2 3.6 Wet, 5cc

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 Special-K N/A 161.4 133.2 28.1 -5.7 2.9 3.2 2209 meter

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 77 48 29.70 2005-05-28 G17 4.9 UMC 147 N/A 162.7 133.3 29.4 -1.7 3.0 3.4 2209 meter

AWC Abraxas 5.72 1.00 4.5 6.3 0.39 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 135.4 27.9 2.5 6.2 4.4 Wet, 5cc, did not cycle G17 reliably. 3 shots only in test.

SWR GS9-K2 7.88 1.25 9.7 8.7 0.40 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 136.1 27.2 -12.3 2.8 3.1 Wet, 5cc

Gemtech SOS-9 5.08 1.25 6.2 4.2 0.39 55 49 30.35 2005-05-06 G17 4.9 UMC 147 N/A 163.3 138.3 25.0 -3.4 4.0 6.0 Wet, 5cc, only 3 shots. No LID.

.22lr unweighted
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
SWR	Warlock		0.00	0.00	0	0.0	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	117.7	43.0	3.8	0.0	0.0
AAC	Pilot		5.04	1.00	4	3.0	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	119.8	40.9	7.2	10.3	13.6
Gemtech	Outback II		0.00	0.00	0	0.0	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	120.8	40.0	7.6	0.0	0.0
SRT Arms	Cheyenne XL		0.00	0.00	0	0.0	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	123.0	37.8	5.5	0.0	0.0
SRT Arms	Apache		0.00	0.00	0	0.0	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	123.0	37.7	7.2	0.0	0.0
SRT Arms	Cheyenne		0.00	0.00	0	0.0	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	123.2	37.6	9.2	0.0	0.0
Tac-Inv	Tac65	$229.99	5.97	1.09	5.6	4.2	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	124.9	35.9	6.7	6.4	8.5	Disassembles
Tac-Inv	Tac67	$359.99	5.97	1.08	5.5	9.5	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	125.1	35.6	11.4	6.5	3.7	Full auto rated, stainless baffles, disassembles.
SRT Arms	Odessa	$285.00	3.93	1.00	3.1	3.0	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	127.7	33.0	9.7	10.7	11.0	Shortest testest this session.
Tac-Inv	Tac52	$244.99	5.20	1.09	4.9	3.7	0.00	60	50	29.50	2005-04-24	P22	3.5	CCI standard	N/A	160.7	128.7	32.1	5.2	6.6	8.7	Disassembles

.308 MIL-STD-1474D
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
SoundTech	AWS	$1150.00	22.50	1.38	33.7	45.0	0.00	74	56	29.80	2005-06-04	AWS	16.0	M80TZ	N/A	169.8	138.6	31.2	2.9	0.9	0.7	Needs AI barrel.
SoundTech	Black Star	$685.00	9.38	1.63	19.6	30.5	0.37	74	56	29.80	2005-06-04	M700	19.5	M80TZ	N/A	169.4	139.9	29.5	2.9	1.5	1.0
SRT	Shadow	$625.00	8.13	1.50	14.4	27.8	0.38	74	56	29.80	2005-06-04	M700	19.5	M80TZ	N/A	169.4	141.2	28.1	-0.1	2.0	1.0	Shortest
Ops Inc.	3rd model		11.88	1.50	21	27.8	0.35	74	56	29.80	2005-06-04	M700	19.5	M80TZ	N/A	169.4	141.4	28.0	1.8	1.3	1.0	Needs special barrel profile.
AWC	Thundertrap		8.75	1.63	18.3	36.5	0.35	74	56	29.80	2005-06-04	SSG-PIIK	20.0	M80TZ	N/A	168.3	141.7	26.6	3.1	1.5	0.7
AAC	Cyclone	$650.00	8.25	1.50	14.6	30.5	0.37	74	56	29.80	2005-06-04	SSG-PIIK	20.0	M80TZ	N/A	168.3	141.8	26.5	2.6	1.8	0.9	All welded.
Gemtech	TPR-S		9.25	1.51	16.6	41.5	0.36	74	56	29.80	2005-06-04	M700	19.5	M80TZ	N/A	169.4	142.1	27.2	3.1	1.6	0.7	Bilock
SWR	Omega 30		8.75	1.50	15.5	27.6	0.39	74	56	29.80	2005-06-04	M700	19.5	M80TZ	N/A	169.4	142.6	26.8	4.3	1.7	1.0
Fisher Enterprises	DC	$850.00	11.20	1.50	19.8	36.5	0.41	74	56	29.80	2005-06-04	M700	19.5	M80TZ	N/A	169.4	145.6	23.7	6.5	1.2	0.6	Connects onto Vortex.
Jet	0.308	$950.00	9.00	1.49	15.7	20.4	0.35	74	56	29.80	2005-06-04	M700	19.5	M80TZ	N/A	169.4	149.7	19.7	3.2	1.3	1.0	Lightest

.308 subsonic MIL-ST
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
SoundTech	AWS	$1150.00	22.50	1.38	33.7	45.0	0.00	74	56	29.80	2005-06-04	AWS	16.0	EBR Thumper	N/A	159.0	121.3	37.7	6.9	1.1	0.8	Needs AI barrel.
SoundTech	Black Star	$685.00	9.38	1.63	19.6	30.5	0.37	74	56	29.80	2005-06-04	M700	19.5	EBR Thumper	N/A	157.3	121.4	35.9	9.5	1.8	1.2
Gemtech	TPR-S		9.25	1.51	16.6	41.5	0.36	74	56	29.80	2005-06-04	M700	19.5	EBR Thumper	N/A	157.3	123.8	33.5	4.7	2.0	0.8	Bilock
AWC	Thundertrap		8.75	1.63	18.3	36.5	0.35	74	56	29.80	2005-06-04	SSG-PIIK	20.0	EBR Thumper	N/A	156.8	125.0	31.9	3.9	1.7	0.9
AAC	Cyclone	$650.00	8.25	1.50	14.6	30.5	0.37	74	56	29.80	2005-06-04	SSG-PIIK	20.0	EBR Thumper	N/A	156.8	126.3	30.5	0.2	2.1	1.0	All welded.
SRT	Shadow	$625.00	8.13	1.50	14.4	27.8	0.38	74	56	29.80	2005-06-04	M700	19.5	EBR Thumper	N/A	157.3	127.0	30.3	11.5	2.1	1.1	Shortest
SWR	Omega 30		8.75	1.50	15.5	27.6	0.39	74	56	29.80	2005-06-04	M700	19.5	EBR Thumper	N/A	157.3	127.7	29.6	1.9	1.9	1.1
Jet	0.308	$950.00	9.00	1.49	15.7	20.4	0.35	74	56	29.80	2005-06-04	M700	19.5	EBR Thumper	N/A	157.3	132.4	24.9	7.9	1.6	1.2	Lightest
Ops Inc.	3rd model		11.88	1.50	21	27.8	0.35	74	56	29.80	2005-06-04	M700	19.5	EBR Thumper	N/A	157.3	133.0	24.3	0.5	1.2	0.9	Needs special barrel profile.
Fisher Enterprises	DC	$850.00	11.20	1.50	19.8	36.5	0.41	74	56	29.80	2005-06-04	M700	19.5	EBR Thumper	N/A	157.3	137.1	20.2	7.2	1.0	0.6	Connects onto Vortex.

.45 SMG MIL-STD-1474
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
Vector	45	$475.00	12.69	1.58	24.8	30.3	0.00	69	48	29.90	2005-11-01	UZI	0.0	American Eagle 230	N/A	0.0	135.8	0.0	N/A	0.0	0.0

40 S&W MIL-STD-1474D
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
Gemtech	Raptor-40		9.00	1.50	15.9	11.6	0.47	88	36	29.90	2005-06-08	MP5/40	8.8	Ranger-SXT 180	N/A	156.8	125.9	30.9	6.9	1.9	2.7	3-lug.

5.45mm MIL-STD-1474D
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
AAC	Krinkov	$595.00	8.75	1.50	15.5	18.7	0.28	88	36	29.90	2005-06-08	AK-74	16.3	Wolf HP	N/A	164.2	0.0	0.0	N/A	0.0	0.0	Barrel threads not aligned. Unsuppressed had no muzzle brake.
AAC	Krinkov	$595.00	8.75	1.50	15.5	18.7	0.28	88	36	29.90	2005-06-08	AKS-74U	8.3	Wolf HP	N/A	167.9	144.5	23.4	-1.2	1.5	1.3	Unsuppressed had no muzzle brake.

5.56mm MIL-STD-1474D
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
SoundTech	M4-Wartech	$585.00	8.00	1.50	14.1	0.0	0.00	84	67	0.00	2005-06-11	M700	20.0	Imported M193	N/A	165.1	130.6	34.5	0.5	2.4	0.0	8 inch can, Tested in GA.
Gemtech	M4-96D	$799.00	7.75	1.50	13.7	25.7	0.28	58	85	29.90	2005-06-18	M4	14.5	Win Q3131A M193	N/A	166.1	133.1	33.0	0.9	2.4	1.3
YHM	3100-A	$535.00	6.62	1.62	13.7	25.0	0.30	54	81	29.90	2006-01-13	M4	14.5	Win Q3131 M193	N/A	165.3	134.0	31.3	1.2	2.3	1.3	Fast attach, weight includes net flash hider vs. A2.
AAC	M4-2000 SOPMOD	$695.00	7.25	1.50	12.8	23.7	0.28	58	85	29.90	2005-06-18	M4	14.5	Win Q3131A M193	N/A	166.1	134.3	31.9	2.7	2.5	1.3	Flash suppressor also works with KAC-M4QD
Gemtech	M4-96D	$799.00	7.75	1.50	13.7	25.5	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	134.4	30.4	0.7	2.2	1.2	Fast attach, BiLock.
HTG	ARIS	$576.00	6.00	1.50	10.6	19.0	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	135.1	29.7	5.5	2.8	1.6	Thead mount.
SWR	SpecWar2		7.88	1.50	13.9	27.3	0.00	77	48	29.70	2005-05-28	M4	14.5	Win Q3131 M193	N/A	167.2	135.2	32.0	1.5	2.3	1.2
SWR	SpecWar1		6.62	1.50	11.7	22.2	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	135.2	29.6	4.3	2.5	1.3	Thead mount.
KAC	M4-QD	$1200.00	6.38	1.52	11.6	22.0	0.30	54	81	29.90	2006-01-13	M4	14.5	Win Q3131 M193	N/A	165.3	135.4	29.9	-1.2	2.6	1.4	Fast attach. Weight includes net flash hider vs. A2.
KAC	M4-QD	$1200.00	6.38	1.52	11.6	22.5	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	135.6	29.3	2.5	2.5	1.3	Fast attach.
AAC	M4-2000	$695.00	7.31	1.50	12.9	21.5	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	135.8	29.1	1.4	2.3	1.4	Fast attach.
SWR	SpecWar2		7.88	1.50	13.9	27.3	0.00	58	85	29.90	2005-06-18	M4	14.5	Win Q3131A M193	N/A	166.1	135.9	30.2	-0.7	2.2	1.1
SoundTech	M4-Wartech	$585.00	6.94	1.50	12.3	21.2	0.27	77	48	29.70	2005-05-28	M4	14.5	Win Q3131 M193	N/A	167.2	136.0	31.2	5.6	2.5	1.5	2209 meter
SWR	SpecWar2		7.88	1.50	13.9	27.3	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	136.0	28.8	0.1	2.1	1.1	Fast attach, BiLock.
AAC	Omni	$695.00	7.00	1.50	12.4	20.2	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	136.1	28.7	1.2	2.3	1.4	Works on A2 flash hider. One piece.
SoundTech	M4-Wartech	$585.00	6.88	1.50	12.2	21.2	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	136.3	28.6	2.9	2.4	1.3	Thead mount.
Gemtech	HALO	$675.00	7.75	1.50	13.7	25.0	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	136.9	27.9	3.3	2.0	1.1	Works on A2 flash hider. Two piece.
SoundTech	M4-Wartech	$585.00	6.94	1.50	12.3	21.2	0.27	58	85	29.90	2005-06-18	M4	14.5	Win Q3131A M193	N/A	166.1	136.9	29.2	4.4	2.4	1.4
KAC	M4-QD	$1200.00	6.50	1.51	11.6	22.3	0.30	58	85	29.90	2005-06-18	M4	14.5	Win Q3131A M193	N/A	166.1	137.0	29.2	5	2.5	1.3
SureFire	FA556A	$1200.00	7.62	1.50	13.5	19.6	0.27	54	81	29.90	2006-01-13	M4	14.5	Win Q3131 M193	N/A	165.3	137.4	27.9	0.4	2.1	1.4	Sound was 137.3 dB at right ear. Fast attach. Weight includes net flash hider vs. A2.
Tac-Inv	Tac16	$374.99	6.63	1.63	13.8	23.7	0.30	58	85	29.90	2005-06-18	M4	14.5	Win Q3131A M193	N/A	166.1	137.7	28.4	3.9	2.1	1.2
SWR	Wolverine		5.75	1.50	10.2	20.0	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	137.9	26.9	-0.3	2.6	1.3	Thread mount.
Gemtech	M4-02	$495.00	6.19	1.38	9.3	17.8	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	138.8	26.1	4.2	2.8	1.5	Thead mount.
AAC	Ranger	$595.00	6.25	1.50	11	19.4	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	138.8	26.0	2.3	2.4	1.3	Thead mount.
HTG	Eureka	$548.00	4.62	1.50	8.2	15.0	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	139.9	24.9	2.4	3.0	1.7	Thead mount.
AAC	SCAR-SD	$995.00	5.88	1.50	10.4	17.6	0.29	54	81	29.90	2006-01-13	M4	14.5	Win Q3131 M193	N/A	165.3	141.4	24.0	3.3	2.3	1.4	Sound was 137.9 dB at right ear. Fast attach. Weight includes net flash hider vs. A2.
HTG	Universal	$477.00	5.62	1.00	4.4	8.2	0.00	69	48	29.90	2005-11-01	M4	14.5	Win Q3131 M193	N/A	164.8	144.2	20.6	-0.1	4.7	2.5	.22lr/.223 dual use. Thread mount.

5.56mm unweighted
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
SoundTech	M4-Wartech	$585.00	6.94	1.50	12.3	21.2	0.27	60	42	29.88	2005-05-14	M4	14.5	Win Q3131 M193	N/A	166.5	137.7	27.8	4.8	2.3	1.3	B+K 2209 meter, linear setting.
AAC	M4-2000	$695.00	7.25	1.50	12.8	23.7	0.28	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	138.8	29.5	-0.9	2.3	1.2	Quick release
Gemtech	M4-96D	$799.00	7.75	1.50	13.7	25.7	0.28	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	138.9	29.4	1.5	2.1	1.1	Bi-Lock mount
SoundTech	M4-Wartech	$585.00	6.94	1.50	12.3	21.2	0.27	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	140.6	27.7	3.2	2.3	1.3
SoundTech	M4-Wartech	$585.00	6.94	1.50	12.3	21.2	0.27	77	48	29.70	2005-05-28	M4	14.5	Win Q3131 M193	N/A	167.8	141.3	26.5	1.9	2.2	1.3	2209 meter
SRT Arms	Hurricane	$545.00	6.25	1.50	11	22.5	0.29	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	141.6	26.7	4	2.4	1.2
SoundTech	Fatboy	$585.00	6.13	2.00	19.3	30.5	0.26	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	141.9	26.4	7.6	1.4	0.9
SWR	SpecWar2		7.88	1.50	13.9	27.3	0.00	77	48	29.70	2005-05-28	M4	14.5	Win Q3131 M193	N/A	167.8	142.0	25.8	3.6	1.9	0.9	2209 meter
KAC	M4QD	$1200.00	6.50	1.51	11.6	22.3	0.30	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	142.5	25.8	-0.6	2.2	1.2
AWC	Optima		8.50	1.63	17.7	30.8	0.30	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	142.6	25.7	3.4	1.5	0.8	Not in catalog.
Gemtech	M4-96C		6.19	1.50	10.9	18.2	0.28	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	142.8	25.5	1.1	2.3	1.4	Thread mount.
SWR	Wolverine		5.76	1.50	10.2	20.0	0.30	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	142.8	25.5	2	2.5	1.3	Thread mount.
SWR	Wolverine		7.13	1.50	12.6	23.5	0.30	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	143.1	25.2	3.9	2.0	1.1	AAC mount.
Gemtech	HALO	$675.00	7.81	1.50	13.8	25.1	0.29	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	143.7	24.6	3.7	1.8	1.0	Mounts to standard flash-hider.
AAC	SCARS-D		5.88	1.50	10.4	19.5	0.28	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	147.6	20.7	1.2	2.0	1.1	Prototype.
Tac-Inv	Tac16	$374.99	6.63	1.63	13.8	23.7	0.30	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	147.6	20.7	3.6	1.5	0.9	Disassembles.
American Manufacturing	XXX Warrior	$429.00	8.25	1.62	17	27.2	0.39	55	49	30.35	2005-05-06	M4	14.5	Win Q3131 M193	N/A	168.3	148.4	18.9	1.4	1.1	0.7	Overbored for 9mm.

9mm MIL-STD-1474D
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	84	67	0.00	2005-06-11	P226R	4.4	UMC 147	N/A	160.3	126.7	33.6	6	3.5	3.6	Tested in GA.
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	59	26	30.21	2005-05-13	G17	4.9	UMC 147	N/A	161.7	131.5	30.2	3.3	3.2	3.2	2209 meter, 4136 mic
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	161.5	131.9	29.6	5.6	3.1	3.2	2209 meter
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	84	67	0.00	2005-06-11	Taurus	4.9	UMC 147	N/A	160.1	135.2	24.9	4.8	2.6	2.9	Tested in GA. Had some grease in it.
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	Special-K	N/A	160.3	136.8	23.5	4.8	2.4	2.7	2209 meter
Gemtech	Trinity	$630.00	8.00	1.25	9.8	8.7	0.40	59	26	30.21	2005-05-13	G17	4.9	UMC 147	N/A	161.7	137.7	24.0	1.7	2.5	2.8	2209 meter, 4136 mic
Gemtech	Trinity	$630.00	8.00	1.25	9.8	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	161.5	138.5	23.1	1.4	2.4	2.7	2209 meter
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	161.5	140.2	21.3	4.3	2.2	2.4	2209 meter

9mm SMG MIL-STD-1474
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
AAC	Avenger		11.44	1.38	17	13.2	0.00	69	48	29.90	2005-11-01	UZI	0.0	UMC 147	N/A	0.0	125.1	0.0	N/A	0.0	0.0
Vector	45	$475.00	12.69	1.58	24.8	30.3	0.00	69	48	29.90	2005-11-01	UZI	0.0	UMC 147	N/A	0.0	135.0	0.0	N/A	0.0	0.0	This is a .45 ACP bore can.

9mm SMG unweighted
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
AAC	Striker-2	$650.00	7.75	1.25	9.5	7.2	0.41	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	0.0	0.0	0.0	N/A	0.0	0.0	Forgot to test. Will be included in followup.
HK	Navy		0.00	0.00	0	0.0	0.00	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	0.0	0.0	0.0	N/A	0.0	0.0
KAC	SD	$975.00	11.75	1.36	17.1	21.4	0.40	55	49	30.35	2005-05-06	MP5SD	5.7	IMI 115	N/A	0.0	123.6	0.0	4.7	0.0	0.0
KAC	Navy	$975.00	7.75	1.37	11.4	14.8	0.41	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	161.4	127.1	34.4	4.5	3.0	2.3	1/2-32 threads
AWC	Mk9A		11.25	1.99	35	26.6	0.45	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	161.4	128.8	32.7	2.2	0.9	1.2	Bixler/SCRC patented 3-lug mount.
HK	MP5SD		11.88	1.58	23.3	18.1	0.39	55	49	30.35	2005-05-06	MP5SD	5.7	IMI 115	N/A	0.0	129.8	0.0	0.5	0.0	0.0
SWR	QD3K		8.63	1.38	12.9	9.0	0.43	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	161.4	130.7	30.8	7.1	2.4	3.4	Latka 3-lug mount
Gemtech	Raptor 9	$635.00	9.00	1.38	13.5	9.9	0.43	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	161.4	131.9	29.6	-0.3	2.2	3.0	Latka 3-lug mount
AWC	Tac-9		9.56	1.38	14.3	24.4	0.39	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	161.4	141.6	19.8	2.4	1.4	0.8	Bixler/SCRC patented 3-lug mount.
TROS	Nemesis-9	$595.00	9.25	1.38	13.8	10.6	0.42	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	161.4	145.7	15.7	1	1.1	1.5	Latka 3-lug mount

9mm unweighted
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	59	26	30.21	2005-05-13	G17	4.9	UMC 147	N/A	162.9	131.1	31.8	2.6	3.3	3.4	2209 meter, 4136 mic, Linear.
SWR	Omega-9		8.13	1.38	12.2	8.8	0.43	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	131.5	31.8	7.3	2.6	3.6	Did not cycle G17 well.
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	55	49	30.35	2005-05-06	USP9 SD	4.7	UMC 147	N/A	163.5	131.7	31.8	4.1	3.3	3.4	Dry
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	132.4	31.0	1	3.3	3.3	Dry
B&T	SD USP9		7.88	1.38	11.8	15.0	0.43	55	49	30.35	2005-05-06	USP9 SD	4.7	UMC 147	N/A	163.5	133.2	30.2	6.7	2.6	2.0
CCF	Impuls-IIa	$750.00	7.75	1.38	11.6	15.1	0.43	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.5	133.6	29.9	8.4	2.6	2.0
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	162.7	137.2	25.5	4.3	2.7	2.7	2209 meter
AWC	HP9		5.36	1.44	8.7	6.9	0.51	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	139.0	24.4	-0.7	2.8	3.5	Uses wipes, no Nielsen, jammed G17.
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	84	67	0.00	2005-06-11	Taurus	4.9	UMC 147	N/A	160.7	140.5	20.3	3.5	2.1	2.3	2209 meter, tested in GA. Had some grease.
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	Special-K	N/A	161.4	140.9	20.5	4.5	2.1	2.4	2209 meter
Gemtech	Trinity	$630.00	8.00	1.25	9.8	8.7	0.40	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	141.8	21.6	3.1	2.2	2.5	Dry
Gemtech	Trinity	$630.00	8.00	1.25	9.8	8.7	0.40	59	26	30.21	2005-05-13	G17	4.9	UMC 147	N/A	162.9	142.1	20.8	0.9	2.1	2.4	2209 meter, 4136 mic, Linear.
Gemtech	Vortex-9		7.31	1.26	9.1	6.2	0.41	55	49	30.35	2005-05-06	MP5N	8.8	UMC 147	N/A	163.3	142.3	21.0	N/A	2.3	3.4	One Shot Only as it has no LID.
Gemtech	Trinity	$630.00	8.00	1.25	9.8	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	162.7	143.3	19.4	0.2	2.0	2.2	2209 meter
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	143.4	20.0	5.3	2.1	2.3	Excessive grease in Nielsen
CCF	Carbon Impuls-Iia	$875.00	7.88	1.45	13	12.3	0.49	55	49	30.35	2005-05-06	USP9 SD	4.7	UMC 147	N/A	163.5	143.9	19.5	3.6	1.5	1.6	9/40/45 model with 9mm baffles.
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	162.7	145.5	17.2	2.8	1.8	2.0	2209 meter
AWC	Jupiter Eye		7.90	1.35	11.3	14.7	0.39	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	146.2	17.1	2.1	1.5	1.2	Did not cycle G17. Only two shots for this test.
AWC	Tac-9		9.19	1.38	13.7	24.0	0.39	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	148.9	14.4	0.5	1.0	0.6	Did not cycle G17 (not supposed to). Two shots only in test.
Gemtech	SOS-9		5.08	1.25	6.2	4.2	0.39	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	149.0	14.3	0.2	2.3	3.4

9mm Wet MIL-STD-1474
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
SoundTech	9mm		0.00	0.00	0	0.0	0.00	84	67	0.00	2005-06-11	Taurus	4.9	UMC 147	N/A	160.1	121.6	38.5	-1.2	0.0	0.0	Tested in GA, ultrasound Gel.
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	161.5	123.1	38.5	-3.2	4.0	4.1	2209 meter
Gemtech	Trinity	$630.00	8.00	1.25	9.8	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	161.5	124.2	37.3	-1.8	3.8	4.3	2209 meter
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	161.5	129.1	32.5	3.2	3.4	3.7	2209 meter
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	Special-K	N/A	160.3	129.8	30.5	-1.8	3.2	3.5	2209 meter

9mm Wet unweighted
Manufacturer	Model	Price	Length	Diameter	Cu. In.	Weight (oz)	Bore	Temp	Humidity	Pressure	Date	Weapon	Barrel Length	Ammunition	Velocity (fps)	Unsuppressed	Suppressed	Net	First Round	dB/ci	dB/oz	Details
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	122.0	41.7	-1.3	4.4	4.4	Wet, 5cc
CCF	Impuls-IIa	$750.00	7.75	1.38	11.6	15.1	0.43	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.5	123.5	40.2	-0.1	3.5	2.7	Wet, 5cc
B&T	SD USP9		7.88	1.38	11.8	15.0	0.43	55	49	30.35	2005-05-06	USP9 SD	4.7	UMC 147	N/A	163.5	123.6	40.1	-2.8	3.4	2.7	Wet, 5cc
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	55	49	30.35	2005-05-06	USP9 SD	4.7	UMC 147	N/A	163.5	123.9	39.9	2.3	4.2	4.2	Wet, 5cc
AAC	Evolution-9	$695.00	7.75	1.25	9.5	9.4	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	162.7	124.8	37.9	-0.3	4.0	4.0	2209 meter
CCF	Carbon Impuls-Iia	$875.00	7.88	1.45	13	12.3	0.49	55	49	30.35	2005-05-06	USP9 SD	4.7	UMC 147	N/A	163.5	126.9	36.6	2.5	2.8	3.0	Wet, 5cc, 9/40/45 model with 9mm baffles.
Gemtech	Trinity	$630.00	8.00	1.25	9.8	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	162.7	129.2	33.5	3.3	3.4	3.9	2209 meter
Gemtech	Trinity	$630.00	8.00	1.25	9.8	8.7	0.40	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	131.7	31.6	-7.2	3.2	3.6	Wet, 5cc
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	Special-K	N/A	161.4	133.2	28.1	-5.7	2.9	3.2	2209 meter
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	77	48	29.70	2005-05-28	G17	4.9	UMC 147	N/A	162.7	133.3	29.4	-1.7	3.0	3.4	2209 meter
AWC	Abraxas		5.72	1.00	4.5	6.3	0.39	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	135.4	27.9	2.5	6.2	4.4	Wet, 5cc, did not cycle G17 reliably. 3 shots only in test.
SWR	GS9-K2		7.88	1.25	9.7	8.7	0.40	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	136.1	27.2	-12.3	2.8	3.1	Wet, 5cc
Gemtech	SOS-9		5.08	1.25	6.2	4.2	0.39	55	49	30.35	2005-05-06	G17	4.9	UMC 147	N/A	163.3	138.3	25.0	-3.4	4.0	6.0	Wet, 5cc, only 3 shots. No LID.

Disclaimer:

While this data is captured in good faith and without bias under controlled circumstances, it is not always comparable to other environments or test equipment. An effort was made to have the data be reproducible and correlate with what a human observer would agree with, but your results may vary. This data must be interpreted with knowledge of how environmental factors such as temperature, humidity, and location effect the results. We do try to compare related products in the same session to make this data as comparable as possible. Please ask the manufacture for their specific test protocol. Do they use 10 or more shot averages or just take the best shot of the day? Ask them.
Individual suppressors may vary depending on age, condition, manufacturing tolerances, and cleanliness. Finally, there is more to a silencer that sound levels. Durability, weight, accuracy, length, attachment method, customer support, etc. all matter so please don't make a decision based on these numbers alone.

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