The Five Stone Tactical Single Port Brake is a Plan B-compatible muzzle brake designed for use with firearms utilizing Plan B-style mounting systems. Manufactured from 17-4 PH H900 stainless steel, the brake is available in both 1/2x28 and 5/8x24 thread pitches to accommodate a variety of rifle platforms. Its design is engineered to provide a secure mounting interface while maintaining compatibility with Plan B-type suppressor mounts and adapters. FeaturesCompatible with all Plan B Muzzle DevicesAvailable in 1/2-28 and 5/8-24 thread sizesIncludes Shims