TacFire AR-15 6-Prong Muzzle Brake 5.56x45mm NATO 1/2x28 Black Oxide Black. The TacFire 5.56 1/2X28 6-Prong Muzzle Brake is an excellent choice that ensures your muzzle doesn't under-function. This muzzle brake by TacFire features a lightweight yet durable design providing a 6 prong device with smooth spherical surfaces. With a hand tuned venting system the shooter is able to dial in the perfect amount of recoil reduction. The high strength tool steel construction ensures that this muzzle brake will last you an extremely long time. Designed to fit all 5.56/223 mil-spec barrels with a 1/2" x 28 thread pitch. For a top quality muzzle brake that you can count on over and over again look no further than the TacFire 5.56 1/2x28 6-Prong Muzzle Brake. Specifications for TacFire AR-15 6-Prong Muzzle Brake: Manufacturer: TacFire Color: Black Caliber: 5.56x45mm NATO Finish: Black Oxide Fabric/Material: Steel Threads per Inch: 1/2x28 Outer Diameter: 0.87 in Length: 2.22 in Weight: 2.6 oz Included Accessories: Standard Country of Origin: USA Package Contents: TacFire AR-15 6-Prong Muzzle Brake Crushwasher TacFire MZ1005-N: AR-15 6-Prong Muzzle Brake 5.56x45mm NATO 1/2x28 Black Oxide Black