Yes, it can be legal to make a silencer. For everything Form-1, from silencer designs that are easily made, to filing forms with the BATF, to 3D modeling. Remember, you must have an approved BATF Form-1 to make a silencer. All NFA laws apply.
blast chamber and end cap all once piece with .050" walls , first cone fully welded into the "blast chamber" , the blast chamber press fits into outer tube and is fully welded to the outer tue
Outer tube is .050" wall x 1.495" ID tube is drilled for plug welding .625" ahead of the blast baffle and .625; apart after that.
first cone is .085" thick , rest of the cones are .040" thick with a 1/4" wide skirt , Cones OD is 1.496" (press fit)
the end cap is a press fit and has the final cone in it making a total of 7 , 60 deg cones that have a bore of .260" and the middle 5 cones are "clipped" 1/2 way across the bore x.130" deep
The whole thing is machined from 17-4 Bar stock , the whole can was heat treated AFTER it was welded and finished machined.
NOTE: as you can see the 3D print wasn't followed exactly
I have compared it to a Surefire , Quick Silver and a Gemtech the tone between the surefire and mine is different but its noticeably more quiet than the Quick Silver and Gemtech.
there was no movement at all from before and after heat treatment
Very nice machining work.
Glad to hear it performs well.
I have a couple Q's:
Why did you thread your "muzzle brake" and not just do another press fit?
Your cone doesnt have a recessed shoulder on the exterior's tapering side. How does it, properly, seat inside the relief you show in the 2nd pic (blast chamber)?
In the 5th pic, you show the mounting end of the suppressor. I'm not seeing how you ended up with that extension and fillet. From the second picture, it looks like the "muzzle brake" is completely threaded which would make me think it would end up flush.
In your design, your mount cap has a series of holes drilled into it, most likely to relieve weight and increase blast chamber volume. Since this and the chamber were machined as one, did you drill the holes, trepan a groove/relief, or go another route?
Are there spacers between each cone?
You said that the end cap has the final cone in it. Do you mean it is actually inside the cap or they were machined together?
From the second pic with the blast chamber, it looks like you cut a chamfer to weld around the tube. Is this correct? Did you machine the weld after?
Did you do the same for the end cap?
Sorry for the questions. It really looks nice. I'm just curious.
Samson104 wrote:blast chamber and end cap all once piece with .050" walls , first cone fully welded into the "blast chamber" , the blast chamber press fits into outer tube and is fully welded to the outer tue
Outer tube is .050" wall x 1.495" ID tube is drilled for plug welding .625" ahead of the blast baffle and .625; apart after that.
first cone is .085" thick , rest of the cones are .040" thick with a 1/4" wide skirt , Cones OD is 1.496" (press fit)
the end cap is a press fit and has the final cone in it making a total of 7 , 60 deg cones that have a bore of .260" and the middle 5 cones are "clipped" 1/2 way across the bore x.130" deep
The whole thing is machined from 17-4 Bar stock , the whole can was heat treated AFTER it was welded and finished machined.
NOTE: as you can see the 3D print wasn't followed exactly
+1
So innovative including the blast chamber with the end cap!
Has so many functional and aesthetic benefits. Great execution.
T-Rex wrote:Very nice machining work.
Glad to hear it performs well.
I have a couple Q's:
Why did you thread your "muzzle brake" and not just do another press fit?
I was originally going to make a couple other brakes but my dad (on trust) doesn't like them so I said screw it and threaded it in then TIGed it in place
Your cone doesnt have a recessed shoulder on the exterior's tapering side. How does it, properly, seat inside the relief you show in the 2nd pic (blast chamber)?
that was one of the cones that was plug welded in the tube right after I cut it , before I "clipped" it. The cone that fit into the blast chamber had a flat flange that was .050" thick
In the 5th pic, you show the mounting end of the suppressor. I'm not seeing how you ended up with that extension and fillet. From the second picture, it looks like the "muzzle brake" is completely threaded which would make me think it would end up flush.
the thick section of the blast chamber is solid , not drilled out like in the 3D print. After the brake was threaded all the way in it was welded (their was a very deep bevel but in the cap and brake before welding so I could clean it up after and still have a deep root) in and the blast chamber welded to the tube to chucked the can up backwards and cut the radius into it to remove all the unneeded materal to trim weight , I honestly think this way saved more weight that drilling the holes on the indside.
In your design, your mount cap has a series of holes drilled into it, most likely to relieve weight and increase blast chamber volume. Since this and the chamber were machined as one, did you drill the holes, trepan a groove/relief, or go another route?
I cut the radius in the end piece rather than drill them out as I think it removes more weight and doesn't affect structural integrity. Honestly I'm to lazy to grind an inside radius tool to work here.
Are there spacers between each cone?
There are no spacers in the tube , its just the plug welds holding the cones in place
You said that the end cap has the final cone in it. Do you mean it is actually inside the cap or they were machined together?
I cut a cone to fit inside the end cap and I TIGed it in place then the cap is press fit into the tube. I didn't think to take any pics because I was running late and wanted to hurry and finish the thing.
From the second pic with the blast chamber, it looks like you cut a chamfer to weld around the tube. Is this correct? Did you machine the weld after?
Did you do the same for the end cap?
Yes that is correct , both the chamber and the tube gor a 29 degree bevel so I could get plenty weld into it , the weld was capped above the OD of the tube then machined off , the end cap was done the same way , then the cap was machined to make a thinner end , I have a pic.
Sorry for the questions. It really looks nice. I'm just curious.
Not a problem at all.
Gonna be doing the machine work for a buddies 9mm suppressor for his little carbine.
Just gotta find the time for both of us to get together for the work , he has no machine skills so its gonna be a schooling experience first and foremost
Looks very Nice! I was thinking the same idea for the rear end on my next suppressor.
When you say there are no spacers and the cones are welded in place, is there space between he cones? Are you concerned at all that they could come loose at all? Not sure if I missed it, what did it end up weighing?
Slow Hand wrote:Looks very Nice! I was thinking the same idea for the rear end on my next suppressor.
When you say there are no spacers and the cones are welded in place, is there space between he cones? Are you concerned at all that they could come loose at all? Not sure if I missed it, what did it end up weighing?
Their is a space of .625" between the cones but their is no "spacer" as in an additional inner tube to separate the cones. The cones have a small skirt that is used as a bearing surface to weld to through the four radial holes for each cones. I am confident in my welding that the plug welds will hold. I've run this can through several mag dumps on a full auto 10.5" rifle as well as put 40-50 rounds though it on a 26" barreled 22-250 Ackley and a 20" 22 BR with no issues.
Id like to build a duplicate of this can for 308 out of titanium just longer , just gotta get the forms done
hey watch this
