Form 1 tech data

clampdriver · Post by **clampdriver** » Sat Mar 05, 2016 9:40 am

Ok folks I am so new to this Im not even crawling yet.I have 2 questions.1 Where can I find the legal requirements for building a suppressor ( I have searched the atf website for a guide ) Probably right under me nose. 2 What kind of Decibel levels should you expect with a finished product on an AR.I have already filed my paper work on a form 1 and have recieved my approved back so I am ready to go ? Any help will be GREATLY appreciated. Thanks Have A Great Day..

RogerRonas · Post by **RogerRonas** » Sat Mar 05, 2016 1:08 pm

How were you able to fill out a form 1 without knowing what you are going to build?
what caliber?
what length?
individual or other?
Man talk about putting the cart before the horse

whiterussian1974 · Post by **whiterussian1974** » Sat Mar 05, 2016 2:42 pm

clampdriver wrote:1 Where can I find the legal requirements for building a suppressor ( I have searched the atf website for a guide ) Probably right under me nose. 2 What kind of Decibel levels should you expect with a finished product on an AR.

First, ?s are normally punctuated w a ?. You are asking for confusion.
Next: 1. The legal requirements are viewtopic.php?f=2&t=123787 and https://www.atf.gov/file/58251/download, https://www.atf.gov/file/11241/download.
Do you have a specific question?
2. Varies depending upon design and your ability. Anywhere from below sonic crack(138dB) to the unsuppressed 168dB.
Subsonic rds are quieter when suppressed. ARs have a noisy gas system. Ejection port noise can be louder than the blast.

clampdriver wrote:I have already filed my paper work on a form 1 and have recieved my approved back so I am ready to go ?

Yes. You can now build. Don't allow anyone access to your parts unless in your presence. A suppressor is a "gun" according to NFA1934. So guard it effectively.

clampdriver · Post by **clampdriver** » Sat Mar 05, 2016 3:01 pm

Sorry I was in a big hurry earlier as my grandaughter was wanting her 4 wheeler ride grandpa promised her.I am going to build a suppressor for an ar15 5.56 caliber.Not knowing that you could put na in the length box I put 8 inches.Again sorry I am a little dumb but not completly stupid,even though it my seem like it to some folks.I am very good at reading and following directions as long as I can find out where to go to get that information.As I understand it since I filled out my form 1 for 8 inches that means an oal length of 8 inches total including adapters and end cap correct ? then since in will be for a 5.56 rd the diameter being .224 is there an allowable variance ? If so how much ? Most of the DIY suppressors I have seen work get about a 117 decibel on the decibel meter,with standard non subsonic ammo. I would think some where on the atf website there would be guidelines for this? Also I do have horses and I can tell you it is impossible to put the horse before the cart.... Again thanks for any and all help...

whiterussian1974 · Post by **whiterussian1974** » Sat Mar 05, 2016 5:13 pm

clampdriver wrote:Again sorry I am a little dumb but not completly stupid,

Don't feel bad about not being completely stupid. That's actually for the best.
(I'm teasing, not being mean. A few on this Site ARE mean and discourage new Members from posting. Many have erased their posts and left. Please have a thick skin and don't get discouraged. Hopefully you've seen that about 20-30 people are very helpful and glad to. There are a handful of miscreants that drift in and out. Just don't engage them unless you enjoy the conflict.)

clampdriver wrote:As I understand it since I filled out my form 1 for 8 inches that means an oal length of 8 inches total including adapters and end cap correct ? then since in will be for a 5.56 rd the diameter being .224 is there an allowable variance ? If so how much ? Most of the DIY suppressors I have seen work get about a 117 decibel on the decibel meter,with standard non subsonic ammo. I would think some where on the atf website there would be guidelines for this? Also I do have horses and I can tell you it is impossible to put the horse before the cart.... Again thanks for any and all help...

A: Not the adapter unless it functions to suppress. (like a booster) Otherwise, just from endcap to endcap.
B: .224" (.22 caliber) is the nominal. That means you can make it larger, but not smaller. I don't know of any cases where caliber marking has been challenged. Some make a .223" w .375" bore. This allows TREMENDOUS errors in making. Lots of bore clearance.
Many people mark the largest caliber that can safely be fired. This encompasses "all lesser, included" sizes.
I suppose that if you used a .22 can on a 10ga shotgun, Wildlife Officials might ? your choice of engraving. But large enough to fire 300 BLK should be fine.
C: Supersonic crack is ~138Db. If you tested 1m left and 10m to front of suppressor, this would be reflected. 117dB is typical of subsonic ammo for centerfire or standard for .22lr.
D: The ATF doesn't list performance guidelines. They just Regulate manufacture, possession, transfer, etc. Actual manufacture specifics, designs, performance, etc is up to Makers and Users.
E: I typically harness the horse b/f the cart. That way he can pull.

Do you harness to side or behind?

clampdriver · Post by **clampdriver** » Sun Mar 06, 2016 5:38 pm

Great information and alot of help thanks.I have very thick skin and controversy nor miscreants bother me.Sometimes good info can be obtained by listening or watching the miscreants. 1 more question then Im off to build.I am going to make removable baffles so I can clean the suppressor,is there any restrictions on them? as how many I have or the design? As im wanting to try several different ideas to make this as quiet as possible.My ultimate goal is to make one that I can use with out hearing protection.Understanding OSHA regs say anything under 120 db is the acceptable level as long as its not a constant long term exposure. Again thanks for all your help

whiterussian1974 · Post by **whiterussian1974** » Sun Mar 06, 2016 6:18 pm

I'll reply PM.

RogerRonas · Post by **RogerRonas** » Sun Mar 06, 2016 7:44 pm

You only get one chance to build the suppressor. No spare p[arts and no changes to try different things.
Sorry for being so negative in my first response to your thread.
Roger

clampdriver · Post by **clampdriver** » Thu Mar 10, 2016 12:03 pm

I sure hope they get this hearing protection act passed that should rid us of all this stuff,geeze need to be a computer with all the dos and donts for something that does you no good with out a weapon anyway..But thanks for all the info and help.It will keep me out of trouble..

faizanmazhar00 · Post by **faizanmazhar00** » Tue Feb 08, 2022 2:02 pm

clampdriver wrote: ↑Sat Mar 05, 2016 9:40 am Ok folks I am so new to this Im not even crawling yet.I have 2 questions.1 Where can I find the legal requirements for building a suppressor ( I have searched the atf website for a guide ) Probably right under me nose. 2 What kind of Decibel levels should you expect with a finished product on an AR.I have already filed my paper work on a form 1 and have recieved my approved back so I am ready to go ? Any help will be GREATLY appreciated. Thanks Have A Great Day..

I sure hope they get this hearing protection act passed that should rid us of all this stuff,geeze need to be a computer with all the dos and donts for something that does you no good with out a weapon anyway..But thanks for all the info and help.

Form 1 tech data

Form 1 tech data

Re: Form 1 tech data

Re: Form 1 tech data

Re: Form 1 tech data

Re: Form 1 tech data

Re: Form 1 tech data

Re: Form 1 tech data

Re: Form 1 tech data

Re: Form 1 tech data

Re: Form 1 tech data