Enlighten me. Why use a muzzle “device” at all with a +P .223 ? Why not just use another 1 1/2” of rifled barrel if you’re going for 16” total?
To me, a 16" 5.56 with a bare muzzle, is noticeably louder than the same with an A2 compensator/flash suppressor. The simple A2 comp also directs less gas toward the ground.
