Just a few questions about SBRs. I have several AR rifles, one suppressor and I've built an AR pistol so I'm not totally unfamiliar. I've just gotten the urge to build a .300 Blk as an SBR and put a suppressor on it.
1. Can I register one of the rifle lowers that I already have as an SBR or should I start with a virgin lower?
2. Can I freely swap different (short) uppers onto one registered lower?
3. Would I be breaking any rules to put a full length upper on a registered SBR lower? (Not that I can think of a reason why I would.)
1. Can I register one of the rifle lowers that I already have as an SBR or should I start with a virgin lower?
2. Can I freely swap different (short) uppers onto one registered lower?
3. Would I be breaking any rules to put a full length upper on a registered SBR lower? (Not that I can think of a reason why I would.)