The Wilson Combat Rapid-Thread Muzzle Brake is engineered for 9mm/350 Legend caliber firearms featuring hardened Melonite steel construction and designed as a robust suppressor attachment for Wilson Combat's Whisper suppressor system.Wilson Combat Rapid-Thread Muzzle Brake5/8x24 internal thread pitch with 24mm x 1.5 external threadingBlack Melonite finish for enhanced durability and corrosion resistanceActs as initial blast baffle to reduce internal suppressor wearEffectively reduces recoil and muzzle riseFits barrels with diameter of .740" - .775" measured 1/2" from threadsDesigned for competitive shooters and tactical applications this muzzle brake provides superior performance whether used standalone for recoil management or as part of Wilson Combat's suppressor system.