The Breek Arms BRK4330 redefines the suppressor attachment experience with its Breek-LOK 3QD system, ensuring rapid deployment and exceptional performance.Featuring advanced engineering, the Echo Single-Port Muzzle Brake minimizes felt recoil and muzzle rise, enhancing stability during rapid succession shooting. Designed for 14.5" barrels to comply with federal regulations, it adds style without compromising on functionality.1/2X28 .223/5.56 CalBreek-LOK 3QD CompatibleDesign: EchoMaterial: 4140 Hardened, NitridedOverall length: 2.06 InchesWeight: 2.1 ozTorque Spec: 20-30 ft lbsPeel Washer IncludedDesigned & Manufactured in AmericaUpgrade your shooting experience with the Breek Arms BRK4330 for enhanced accuracy and control.