SBR/pistol barrel length???

[hlee]

Just curious when you SBR a rifle with the ATF do you have to state exactly what the barrel length is?

Yes

Since the lower is actually going to be the serialized part would it be illegal to change the length of the barrel after you receive the tax stamp?

No

Wouldn't it be similar to how if you have a legal full auto lower you can use it with different uppers?

Yes

Sorry not trying to derail the thread.

I’m not a lol-yer. Don’t risk your freedom with legal advice freely given on the internet.

 

[alamo5000]

Just curious when you SBR a rifle with the ATF do you have to state exactly what the barrel length is? Since the lower is actually going to be the serialized part would it be illegal to change the length of the barrel after you receive the tax stamp? Wouldn't it be similar to how if you have a legal full auto lower you can use it with different uppers?

Sorry not trying to derail the thread.

Yes. You have to put the caliber and barrel length on the form. That said you can swap lengths and calibers at will. The common practice should probably be to hang on to the original upper but as long as you do you can use whatever you want on the lower.

 

[Obi-WanKannoli]

a mid length gas setup does run significantly smoother than a carbine length gas

you could probably get away with a 12.5" midlength with the extra dwell length if it will be used 100% suppressed

12.5" mid might be iffy for non suppressed depending on a lot of variables

11.5" is the easy button but a little gassier

LMT has this figured out pretty well with the SpecWar. Mine ran perfect suppressed and unsuppressed with any ammo i put in it.

 

[LRRPF52]

12” seems long to me now.