Varmint
NES Member
But he just said he bought an assembled upper receiver without a barrel. An upper is not a gun, and it doesn't matter what device or threads or lack of pin and weld is on the barrel. If it's never put on a lower, it doesn't matter.
Only the gun can be non-compliant, the upper is part of that, but by itself it means nothing. I can buy an 10" barreled upper and not put it on a lower. That doesn't mean I now have an SBR or am violating the AWB with a >50oz pistol.
I believe that’s not true, that you could be guilty of constructive possession if you have all the parts needed to make an AWB or an NFA item. It’s typical MA confusion but I wouldn’t say with confidence it’s legal. And you have to worry about Federal laws as well, ie having a 10” upper and a complete lower.
In Mass, a separate upper and lower are easily assembled and are therefore a firearm.