Maxim Defense AR-15 Hate Brake Muzzle Booster increases reliability for short-barrel PDWs by directing exhaust gases forward to improve cycling. It reduces muzzle flash, lowers recoil, and can improve accuracy. The Hate Brake installs from the front using a 3/8 drive socket and can be timed to fit under most handguards. It uses K-Taper locking technology and is designed to work with M-Slot compatible handguards. Specifications include a diameter of 1.75 in, length of 2.4 in, and weight of 4.6 oz. Made from 17-4 H900 Stainless and 6Al-4V Titanium with a Stainless Shroud and Octagon design. Country of Origin: USA. Package contents: Maxim Defense AR-15 Hate Brake Muzzle Booster.