Having the same performance and precision interior dimensions as both the BC1.0 and the BC1.5 -- the BattleComp 2.0 SCV has the same external length and OD as an A2; accordingly, the BC2.0 is compatible with most devices intended to integrate with an A2 (except a Blank Firing Adapter). Made from 17-4 PH heat treated stainless steel bar stock with a black oxide finish, the BattleComp 2.0 fits all barrels with 1/2 x 28 RH standard threads, and is specifically designed for 5.56 NATO and .223 Rem ammunition. For those requiring a non-slip muzzle device, the BattleComp 2.0 comes complete with a shim kit for ease of professional installation with Rocksett. The BattleComp 2.0 SCV is an excellent compensator many of us have grown to love, and gives the user flexibility for suppressors and silencers meant for the A2 flash hider. Specifically designed for 5.56 NATO and .223 Rem ammunition. Shims included.