1371MARINE
Plinker
Let's say I Form 1 one of my lowers and register it with a 10.5 in. barrel in 5.56. What limitations are there on placing different uppers on that lower? ie... different calibers and lengths. I'm asking this from a legal standpoint. Also on a different note... are you required by law to carry the paperwork for your NFA items with you when you are at the range, etc? Thanks in advance