The Five Stone Tactical 3 Prong Flash Hider is a Plan B-compatible flash hider designed for use with Plan B-style mounting systems and compatible muzzle devices. Manufactured from 17-4 PH H900 stainless steel, available in Heat Treated or Black Nitride finishes and offered with 1/2x28 bored to 0.375 or 5/8x24 bored to 0.465 thread pitches to accommodate a variety of rifle platforms. The cage-style design is engineered to provide a secure mounting interface while helping to reduce visible muzzle flash. FeaturesCompatible with all Plan B Muzzle Devices3 Prong includes Shim KitFits Plan B type mounts