OPMOD Kaw Valley OPMOD Self Timing Muzzle Brake Black 1/2x28. Its two-port design is ideal for target shooters and anyone looking to significantly reduce muzzle rise and felt recoil. Constructed from high-strength 17-4 stainless steel this brake is engineered for hard-use applications and extended range sessions. The durable black nitride finish offers excellent corrosion resistance and a sleek low-glare look. Featuring an integral jam nut the OPMOD brake allows quick tool-friendly installation and precise timing without shims or crush washers. Once aligned it locks in solid ensuring consistent performance shot after shot. Specifications for Kaw Valley Precision OPMOD Self-Timing Muzzle Brake: Manufacturer: OPMOD Color: Black Outer Diameter: 1.02 in Length: 2.35 in Features of Kaw Valley Precision OPMOD Self-Timing Muzzle Brake:Two-Port Design Reduces recoil and muzzle riseSelf-Timing Integral jam nut allows quick precise alignment without shims or crush washers17-4 H900 SS Chosen for strength and durability in hard-use applicationsBlack Nitride Finish Corrosion-resistant and a low-glareLightweight Performance Heavy-duty braking power in a compact package Package Contents: Kaw Valley Precision OPMOD Self-Timing Muzzle Brake OPMOD KVP-OPMOD-STMB01: Kaw Valley OPMOD Self Timing Muzzle Brake Black