The BATTLEARMSA(R) Fluted flash can is designed to direct muzzle flash forward away from the operator. This product is not designed to reduce muzzle rise, sound, recoil or muzzle flash. This product is designed to direct gas and noise away from the operator while enhancing the firearms appearance. Specifications: Muzzle Thread Pitch: 1/2x28 Outside Diameter: 1.2in Length: 1.5in Caliber: 9MM Material: 6061 Billet Aluminum Finish: Black Anodize Type 3 Hard Coat