The Surefire PROCOMP Muzzle Brake is the perfect choice for any shooter looking for improved accuracy and recoil reduction. This muzzle brake is designed to fit all 5.56mm and 7.62mm caliber rifles, and features two large ports on the top and bottom that redirect gas away from the shooter, promoting smoother follow-up shots and reducing felt recoil. It also features two side ports that reduce muzzle rise and enhance accuracy. This muzzle brake is constructed from stainless steel and is corrosion-resistant for long-lasting durability. The Surefire PROCOMP Muzzle Brake is a great choice for any shooter looking to improve their shooting experience. Advanced muzzle brakes for your 5.56 mm or 7.62 mm long gun Significant muzzle rise and recoil impulse reduction Patented Impulse Diffusion design minimizes side and rear blast SPECIFICATIONS Features: Offset porting greatly reduces recoil impulse and muzzle rise so the weapon tracks straight back to keep you on target for faster shot-to-shot recovery Precision machined from U.S. mill-certified steel bar stock High-precision barrel threads for optimum thread interface Pilot hole located at 9 o’clock for tuning to suit individual shooting styles or ammunition characteristics Pilot hole located at 6 o’clock for pin-and-weld applications Black nitride coating provides maximum protection against harsh environmental conditions ProComp 556 fits M4/M16 weapons and variants with 1/2-28 muzzle threads ProComp-762-5/8-24 muzzle brake fits AR10/LR308 rifles and variants with 5/8-24 muzzle threads Installation requires no permanent modifications for M4 / M16 / AR15-type weapons Durable construction delivers a long service life Proudly designed and manufactured in the U.S.A. SureFire ProComp muzzle brakes are stand-alone muzzle devices and do not serve as mounts/adapters for any SureFire Fast-Attach® sound suppressors