09-05-2023, 08:56 PM
<16" BBL and the ability to be shoulder fired = SBR.
<26" firearm with attachments fully extended, and ability to be shoulder fired = SBR. This can be relevant to bullpups.
The two are independent of each other.
Permiant attachments that are pin and welded, extend barrel length. Note that barrel extensions (inside reciever) does not. Threaded on items secured simply by torque and loctite do not. It's basically measure by rod from closed bolt to end of barrel with all threaded or otherwise removable muzzle bits removed.
FWIW a carefully done P&W job can be quickly removed by filing off the weld and pulling out the pin, should one decide to replace or alter the item - though have a care that technically its an SBR for that short term, if it is shoulder fireAble.
Also, in case you missed it, for 10 years the ATF has said arm braces are arm braces, and aren't intended to be shoulder fired, and so are not stocks, and so such items so equiped onto complete firearms are actually pistols. This year, they changed their mind. If you already have one of such, I doubt ATF enforcement will be serious, and they are already on thin ice with the courts. However, I would exercise care building something like that anew going forward. No commercial standard FFL will sell you a complete firearm <16" BBL with an armbrace today - which tells you all you need to know on if that's a good idea.
<26" firearm with attachments fully extended, and ability to be shoulder fired = SBR. This can be relevant to bullpups.
The two are independent of each other.
Permiant attachments that are pin and welded, extend barrel length. Note that barrel extensions (inside reciever) does not. Threaded on items secured simply by torque and loctite do not. It's basically measure by rod from closed bolt to end of barrel with all threaded or otherwise removable muzzle bits removed.
FWIW a carefully done P&W job can be quickly removed by filing off the weld and pulling out the pin, should one decide to replace or alter the item - though have a care that technically its an SBR for that short term, if it is shoulder fireAble.
Also, in case you missed it, for 10 years the ATF has said arm braces are arm braces, and aren't intended to be shoulder fired, and so are not stocks, and so such items so equiped onto complete firearms are actually pistols. This year, they changed their mind. If you already have one of such, I doubt ATF enforcement will be serious, and they are already on thin ice with the courts. However, I would exercise care building something like that anew going forward. No commercial standard FFL will sell you a complete firearm <16" BBL with an armbrace today - which tells you all you need to know on if that's a good idea.
4x P100