TacFire ACE Tunable Muzzle Brake Features The TacFire ACE Tunable Muzzle Brake is machined from 4140 chrome moly vanadium steel and finished with a durable nitride coating that resists corrosion and heat discoloration. Measuring 2.42 inches long with a 0.99 inch diameter and a 0.26 inch bore at the muzzle end it threads onto 1/2x28 barrels at just 4.5 ounces. Five gas port adjustment screws allow the shooter to fine tune how much gas is redirected letting the brake be dialed in to the specific rifle and load being run. This tunability sets it apart from fixed-port brakes that cannot be adjusted after manufacture. Installation includes a provided crush washer and the recommended process calls for test firing roughly ten rounds to establish a baseline before seating the gas port screws to the desired reduction in muzzle rise. Once the ideal screw configuration is found cleaning the threaded ports and applying the included thread locker locks that setting in for the long term. A minimum 24 hour cure time is recommended before firing again to ensure the thread locker fully bonds. For shooters chasing a genuinely tuned low-recoil setup on their 1/2x28 threaded barrel the ACE brake offers a level of customization fixed brakes cannot match. TacFire ACE Tunable Muzzle Brake Specifications Manufacturer: TacFire Model: ACE Tunable Muzzle Brake Color: Black Material: 4140 CMV Steel Finish: Nitride Length: 2.42 Diameter: 0.99 Thread Pattern: 1/2x28 Weight: 4.50 oz Available At: GrabAGun