The Salmon River Solutions Grim suppressor brake was designed with the intent of making a great performing suppressor brake at a minimum weight and length. With optimized porting manufactured on a 5 axis mill the Grim was able to cut extra weight, and make something that looks truly unique. Features308 caliber and smallerOptimized for non magnum cartridges muzzle rise control Self timing that adds almost zero length and weight1.8" Length NotesScythe grims will not work with an omega 300Ships with a single ampule of rocksett.Scythe grims come with a wrench.For reaper grims please use your unknown suppressors reaper wrench. Wrench not included.