The Lantac Dragon Dead Air KEYMO Muzzle Brake is precision machined and hardened with a durable Nitride finish. The gas handling system reduces muzzle rise and recoil while the Short Pulse system is designed to reduce recoil on repeating shots. The Dead Air KEYMO quick mount system makes this muzzle brake compatible with the Dead Air Sandman suppressor and other suppressors that use the same mounting system.Features: Designed for 7.62/.308 Includes appropriate shim set for timing the brake Dead Air KEYMO suppressors Does NOT work with BMD, Blast Mitigation Device California Legal - Not considered a flash hider Made in the U.S.A.Lantac USA manufactures the highest quality accessories for AR-15/M16 pattern rifles. Precision made in the U.S.A., rifles, muzzle brakes and more.