A friend is putting together his first AR build and those are his twist choices for the barrel he wants. But neither of us has a clue on why to select one over the other. The weapon will be used primarily for plinking and having fun target shooting, maybe up to 200 yards or so. So, which one is better, and why? Or does it not matter for his application? Thanks for any answers you pros can give. ~J.Murphy
If it matters, it will be built on a CMMG upper and lower with a YHM barrel and guard.