After researching spare parts for my AR, I see that you can buy Semi or Full Auto bolt carrier groups.
I searched some of the AR sites to see if one was better quality than the other and soon discovered there is a debate on whether buying a full auto BCG was a red flag for the BATF?
Some say a FA BCG is a full auto part, therefore an attempt to make your semi, full auto.
Others debate that full auto is in the fire control, therefore the BCG has nothing to do with it.
1. What do you all think?
2. What other spare parts should I keep on hand for my AR?
I'm looking forward to reading your opinions on the subject.