Must have block - Superlative Arms Adjustable Bleed Off Gas Block

If you use any type of suppressor, you must have some kind of adjustable gas block. The superlative arms bleedoff mode is the coolest feature and keeps all my guns much cleaner after 3 or 400 rounds compared to the other options out there that still push all the extra air back at you and fowls up your gun about 5x faster without one. Best one on the market. You can tune any gun to near perfect with this one.