Originally Posted by
aguila327
First question: Have you fired the weapon with both of the carriers in question?
Second: If so was there any noticible difference which may cause you concern? If not, go shoot them and see whats happening.
If not, use whichever one you want. The benefit is that you know you have a tested spare awaiting you if the need arises. Don't overthink it. I don't get hung up on F/A or semi carriers as long as the rifle keeps chugging along I'm happy.
Buffers are cheaper than BCG's so you can address any cycling issues in that manner.