Met up with a few of the guys here and finally got a chance to try out my AAC ND6 suppressor. Both rifles DI 5.56 has Nickel boron PSA BCG, Slash rifle buffer/spring and SSA-E trigger. PSA assembled 18" rifle gas upper. Other Aero M5 keymod upper assembled 16" mid gas Armalite carbine setup, Nitrate Wilson BCG a Velocity single stage trigger. Steel gas blocks, BAD safety's, Griffin CH. Earlier I went to LGS and they verify alignment with the can. There were no issues. The Black hills suppressor cover worked well. Fukin can does get hot. So you can run well without an adjustable gas block. Watching Eric with that little Allen key adjusting his gas block I would be hard pressed with my arthritic hands. Mag was sooty I didn't feel anything out of the ordinary as far as excess gas in the face. Made shooting fun again. Also easy wipe off on both coated BCG's.