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.
When I submitted my form 1 I put "308" as the caliber box but when my tube was engraved ".308" was put on it.
Do I need to get another tube because of addition of a engraved period, or does the ATF allow for common caliber names?
My suppressor is looking to be about 12 1/4 in and I put 13 inches on the form. I've read that you need to inform them when your 1/2 short from the forms length. I e-filed.
Do I notify them by mail to where the F1s are sent to?
My initial drawings have made space for a 3 inch SS blast chamber followed by a SS baffle, Ti spacer and SS baffle followed by 5 Ti baffles. However the direction of the cones is counter to what alot of companies manufacture/sell. I've attached my first draft blueprint.
Does baffle direction signification effect gas dispersion, to the point where it would be best to flip the baffles?
EDIT: Upon making this post I realized that I have a SBR that only has the Trust Name and Trust Location engraved on it. The caliber engraving is listed as multi on the lower by the manufacturer but 5.56 on the F1. Will I need to get that lower re-engraved as well.
Id say your ok with the caliber engraving mishap. You're allowed to engrave whatever you want so the decimal point is just an addition. You've met the requirement to engrave "308". Next time, register it as 30cal.
Your design is huge. Is this going on a FA firearm, by chance?
A 3" blast chamber is unnecessary, even on a gas gun.
Yes, baffle design and orientation is crucial to an efficient design. Your design is allowing the gas an easy path out of the suppressor. Flip those things around.
Your baffle spacing is very large, especially if this is meant for HV ammo. The Sig SRD762 has 13 baffles in less than 7". Not saying that this is the only way to accomplish the task, but something is to be said for it.
As far as your SBR Q, you're only required to mark the reciever (lower in regard to AR) with the serial. All else can be put on the upper or barrel. As such, your barrel should be stamped w/ the caliber, from the factory. So, you're in compliance.
T-Rex wrote:Id say your ok with the caliber engraving mishap. You're allowed to engrave whatever you want so the decimal point is just an addition. You've met the requirement to engrave "308". Next time, register it as 30cal.
Your design is huge. Is this going on a FA firearm, by chance?
A 3" blast chamber is unnecessary, even on a gas gun.
Yes, baffle design and orientation is crucial to an efficient design. Your design is allowing the gas an easy path out of the suppressor. Flip those things around.
Your baffle spacing is very large, especially if this is meant for HV ammo. The Sig SRD762 has 13 baffles in less than 7". Not saying that this is the only way to accomplish the task, but something is to be said for it.
As far as your SBR Q, you're only required to mark the reciever (lower in regard to AR) with the serial. All else can be put on the upper or barrel. As such, your barrel should be stamped w/ the caliber, from the factory. So, you're in compliance.
Thank you for the reply.
I'll drop the blast chamber down to 2 inches, flip the baffle stack around and remove the .25 spacers. I wanted the gas to have sufficient room to expand which is why the spacing.
A question on clearance.
I have a SS spacer tube at 1.32 OD 1.10 ID and when placed into a 1.35 tube I'm left with .03 of clearance. If the baffle holds it centered leaving .015 of clearance between the spacer and suppressor wall should the spacer still be used?
AbbandonZK wrote:A question on clearance.
I have a SS spacer tube at 1.32 OD 1.10 ID and when placed into a 1.35 tube I'm left with .03 of clearance. If the baffle holds it centered leaving .015 of clearance between the spacer and suppressor wall should the spacer still be used?
Shoot, I'd get a different piece of tubing for a spacer; the thickness of that thing is ridiculous. You're adding a bunch of unnecessary weight and eating up volume that could be helping reduce noise.
Not sure I saw it, what velocty projectiles are you running? HV, SS or both?
Are you buying baffles (80% storage cups) or making them yourself?
I think you should be ok to go 8.5" OAL. Bring your spacing down a bit. Maybe more like .5". And give yourself a larger chamber before exit. Incorporating a muzzle device is a good idea. Helps disperse initial gas release and aids in blast baffle longevity.
Not understanding what that flat sisc is doing between cone baffles 1&2. Put it first or get rid of it.
T-Rex wrote:Not sure I saw it, what velocty projectiles are you running? HV, SS or both?
Are you buying baffles (80% storage cups) or making them yourself?
I think you should be ok to go 8.5" OAL. Bring your spacing down a bit. Maybe more like .5". And give yourself a larger chamber before exit. Incorporating a <a class="vglnk" target="_blank" href="http://www.brownells.com/search/index.htm?k=muzzle" rel="nofollow"><span>muzzle</span></a> device is a good idea. Helps disperse initial gas release and aids in blast baffle longevity.
Not understanding what that flat sisc is doing between cone baffles 1&2. Put it first or get rid of it.
I designed the suppressor to be over built so I can run any type of projectile thru it. I already have the cups needed for it and they have a .66 in wall. The second spacer between 1&2 is a gas expansion chamber. I'm designed this as a direct mount as when I ordered the parts most retailers of muzzle brake mounts didn't have them in stock. But I'll check some retailers out again.
