My 9mm Form 1 with booster

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.

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twodollarbill
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My 9mm Form 1 with booster

Post by twodollarbill » Sat Nov 26, 2011 9:36 pm

Thought I'd post pics of my latest 9mm form 1 project.
This one was really fun to make.....as I wanted k baffles and make a booster for use with my G19
The k baffles, end cap and rear mount are 7075 aluminum, Tube is 6061. The booster body and piston are 316 stainless steel.
Compression spring is a stainless steel .85" x 1.5" rated at 24 lbs from MSC Industrial Supply (part#03309093).
Outer surfaces finished with LWC Duracoat flat black.
My postal scale went missing, so I'm not sure on the total weight.
I'm really pleased with how it turned out and I've so far run 60 rounds though it without failure.
(subsonic handload round of a 147gr Berry FMJ with 3.5grs of Bullseye).
I've made an adapter for my Colt 9mm carbine that screws into the rear mount.
Hope to get out to the range again soon.
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Shift1
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Re: My 9mm Form 1 with booster

Post by Shift1 » Sat Nov 26, 2011 9:44 pm

Nice work.....how does it sound? Vids?
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delta9mda
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Re: My 9mm Form 1 with booster

Post by delta9mda » Sat Nov 26, 2011 9:52 pm

you have made jedi status.
NP

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twodollarbill
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Re: My 9mm Form 1 with booster

Post by twodollarbill » Sat Nov 26, 2011 10:08 pm

delta9mda wrote:you have made jedi status.
That's DAM funny!!!!
I get only 1% time on the lathe, otherwise my oldest son is cranking out
custom "light sabers" that are made out of 30 or more parts.

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SilentMike
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Re: My 9mm Form 1 with booster

Post by SilentMike » Sat Nov 26, 2011 10:21 pm

Awesome work. Tackling a boosted can is not for the faint of heart. You should be really proud!

On an unrelated note, I'm going to out myself and confess my undying geekness by admitting that I am currently working on a screen accurate version of the lightsaber Luke carried in The Empire Strikes Back.
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Capt. Link.
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Re: My 9mm Form 1 with booster

Post by Capt. Link. » Sat Nov 26, 2011 10:28 pm

Sweet clean build. I see you did your homework jedi knight may the silence be with you! 8)

Mike are you going for a green visible laser with a beam spreader?
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twodollarbill
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Re: My 9mm Form 1 with booster

Post by twodollarbill » Sat Nov 26, 2011 10:44 pm

Thanks for the compliments........This was a fun build.

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Re: My 9mm Form 1 with booster

Post by SilentMike » Sat Nov 26, 2011 11:04 pm

Capt. Link. wrote:Sweet clean build. I see you did your homework jedi knight may the silence be with you! 8)

Mike are you going for a green visible laser with a beam spreader?
Remember Capt. Link., I'm shooting for screen accurate:). I'm using a blue LED with a dueling blade.
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Bandit
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Re: My 9mm Form 1 with booster

Post by Bandit » Sun Nov 27, 2011 12:24 am

Nice first time build. Have you considered more notches on the piston to adjust for POI if needed ?
Is the cone angle on the K's 60 degrees ?




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Re: My 9mm Form 1 with booster

Post by ChimeraPrecision » Sun Nov 27, 2011 3:43 am

SilentMike wrote:
Capt. Link. wrote:Sweet clean build. I see you did your homework jedi knight may the silence be with you! 8)

Mike are you going for a green visible laser with a beam spreader?
Remember Capt. Link., I'm shooting for screen accurate:). I'm using a blue LED with a dueling blade.
Mike If you want to make a light saber screen accurate may I suggest 445nm 1Watt Laser diodes with driver circuits. Each laser will put out blinding light capable of burning through dvd cases.

I built one recently (in flashlight not lightsaber form) And its so fun. Highly recommend
Keep calm, and suppress on

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Re: My 9mm Form 1 with booster

Post by LavaRed » Sun Nov 27, 2011 4:35 am

Awesome build. My hat off to you sir.
Love the shape too!
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Re: My 9mm Form 1 with booster

Post by twodollarbill » Sun Nov 27, 2011 1:59 pm

Bandit wrote:Nice first time build. Have you considered more notches on the piston to adjust for POI if needed ?
Is the cone angle on the K's 60 degrees ?
.
I did consider POI.......I machined the one notch in the piston at 12 o'clock when on my G19.
I test fired a few rounds and was happy with that grouping, marking the top of the tube.
I then installed a stainless screw inside the rear mount matching the position on the piston at 12 o'clock.
Using a round head screw the piston's notch slides onto it smoothly too. It holds great when threading on and off the barrel.

Yes....the angle on the k's is 60 degrees too.
I made all the k's the same size and was going to adjust for fit inside the tube by reducing the size of the blast chamber.
I did not want to go less than 1/2 in. for the blast chamber, so I ended up having to trim the
length of the last (3) k's to get a tight fit.

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Re: My 9mm Form 1 with booster

Post by PTK » Sun Nov 27, 2011 2:45 pm

Outstanding work! Truly, thanks for sharing the pictures, you did an amazing job. :)
RIP Dave. You will be missed.

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Re: My 9mm Form 1 with booster

Post by Wyatt9k » Mon Nov 28, 2011 1:03 am

PTK wrote:Outstanding work! Truly, thanks for sharing the pictures, you did an amazing job. :)
+1

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Re: My 9mm Form 1 with booster

Post by daviscustom » Mon Nov 28, 2011 9:27 am

Very cool! This is what I am leaning toward for my next build...still deciding k's or omegas....Really looking forward to hearing yours ....video please.
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Re: My 9mm Form 1 with booster

Post by delta9mda » Mon Nov 28, 2011 9:47 am

daviscustom wrote:Very cool! This is what I am leaning toward for my next build...still deciding k's or omegas....Really looking forward to hearing yours ....video please.
evidence shows k's are better than omegas (not starting a s--t storm here, just an observation).

still loving build.
NP

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Bandit
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Re: My 9mm Form 1 with booster

Post by Bandit » Mon Nov 28, 2011 10:14 pm

twodollarbill wrote: I did consider POI.......I machined the one notch in the piston at 12 o'clock when on my G19.
I test fired a few rounds and was happy with that grouping, marking the top of the tube.
I then installed a stainless screw inside the rear mount matching the position on the piston at 12 o'clock.
Using a round head screw the piston's notch slides onto it smoothly too. It holds great when threading on and off the barrel.
That was a smart thing to do.
twodollarbill wrote: Yes....the angle on the k's is 60 degrees too.
I just learned that 60 degree K's are prefered for 9mm.
Nice to see what others are doing.



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Re: My 9mm Form 1 with booster

Post by Bendersquint » Mon Nov 28, 2011 10:40 pm

Bandit wrote: I just learned that 60 degree K's are prefered for 9mm.
Nice to see what others are doing.
Who prefers them?

-B

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Re: My 9mm Form 1 with booster

Post by winsor » Tue Nov 29, 2011 12:08 am

delta9mda wrote:
daviscustom wrote:Very cool! This is what I am leaning toward for my next build...still deciding k's or omegas....Really looking forward to hearing yours ....video please.
evidence shows k's are better than omegas (not starting a s--t storm here, just an observation).

still loving build.
X's quite good I like it.
1.375" x 7.4"
http://www.youtube.com/watch?v=I_87gi774us
░░ in search ☼f the silence ░░ ִ ִ ִ ִ ִ ִ ִ ִ ִ n☼ hunting , n☼ killing , just plinking ☼ ☼☼

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Bandit
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Re: My 9mm Form 1 with booster

Post by Bandit » Tue Nov 29, 2011 10:11 am

Bendersquint wrote:
Bandit wrote: I just learned that 60 degree K's are prefered for 9mm.
Nice to see what others are doing.
Who prefers them?

-B
Obviously the OP huh ?
Works for him. I only seen 60 degree being used so far but only from guys doing F1's.
Never implied it's the go to angle for everyone doing 9mm.

Now if you want to try to enlighten all of us with your can buster knowledge maybe you will tell us what the manufacturers are using ? Looks like you are waiting for the opportune time to jump in and tell us all what we need to know so we can make better cans for ourselves. Come on, spill the beans. You're on the hook now so give up the info.



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Re: My 9mm Form 1 with booster

Post by delta9mda » Wed Nov 30, 2011 3:02 am

all typical k's are 60 degree (tirant 45's are not).

import a pic to cad and trace. dim the angle, its all there.
NP

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Re: My 9mm Form 1 with booster

Post by delta9mda » Wed Nov 30, 2011 3:03 am

bump for awesome.
NP

wil
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Re: My 9mm Form 1 with booster

Post by wil » Sat Jun 23, 2012 1:32 pm

Excellent work on your part. Now I understand better what a booster is & how it works.

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Re: My 9mm Form 1 with booster

Post by CThomas » Sat Jun 23, 2012 3:55 pm

I missed this thread. Very nice work indeed!
Tried to save a few of those photos but once saved they only show in a distorted way. I have seen this happen on several occassions.
Anyone know why?

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Re: My 9mm Form 1 with booster

Post by twodollarbill » Sat Jun 23, 2012 6:19 pm

The suppressor now has over 500 rounds and functions flawlessly on the G19.
Threads look great and no visible damage to the lockup areas of the slide or barrel.
I had a chance to accurately measure the spring strength in my factory cans and
I did not use the spring in the original post, I decided to use a heavier one.
From MSC, stainless steel .845x.091x1.5 rated at 49lbs.
http://www1.mscdirect.com/CGI/NNSRIT2?P ... 0003348006

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