Sorry if this has already been discussed.
I'm looking to build an M4 style AR and I'm wondering how small it can be before it is an SBR? Looking on Brownells I see they sell a 16" uppers but, also noticed I could build an upper with a shorter barrel.
I'm thinking of using an A1 fixed butt stock, if that helps.
Thanks in advance.
StevensMarksman
I'm looking to build an M4 style AR and I'm wondering how small it can be before it is an SBR? Looking on Brownells I see they sell a 16" uppers but, also noticed I could build an upper with a shorter barrel.
I'm thinking of using an A1 fixed butt stock, if that helps.
Thanks in advance.
StevensMarksman