The Lantac Dragon 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 GemTech quick mount system makes this muzzle brake compatible with with any GemTech Bi-lock suppressors.Features: Designed for .308 / 7.62 Includes appropriate shim set for timing the brake 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.