Having the same performance as the BC1.0 and the BC2.0 SVC, the BC1.5 has been extended and pre-drilled for permanent attachment on 14.5" barrels needing 16.1" overall length. Professional installation is required. Made from 17-4PH heat treated stainless steel bar stock with a black oxide or matte stainless finish, the BattleComp 1.5 fits all barrels with 1/2 x 28 RH standard threads. Specifically designed for 5.56 NATO and .223 Rem ammunition. Crush washer included.