Thank you all for the help. It seems in line with answers from others I've talked with. Although based on the variety of answers, opinions, etc... a call to the ATF wouldn't hurt. Thanks again INGO
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...