Iam now putting together my first AR15 build. I just purchased a Aero Precision M4E1 AR-15 Upper Receiver + GEN 2 Free Float Rail and iam looking at a Aero
AR15 Ambidextrous Lower Receiver and a Prime Weaponry DIAMOND (DLC) BOLT CARRIER GROUP. I need some advice on purchasing a 16" barrel. What does the group recommend?