This Midwest Industries .30 Caliber Flash Hider / Impact Device is designed for .308 and .300 AAC Blackout rifles but is also capable of fitting any .30 Caliber rifle with a 5/8 x 24 threaded barrel. The MI-30MB1 Flash Hider is designed to reduce the visible flash to prevent hindering your vision in in low light conditions as well as slightly reducing felt recoil. This muzzle device also has an addition feature, an integrated impact device that is designed for breaking glass and other thin materials in an emergency situation. This Flash Hider muzzle device is made from tool steel with a tough phosphate finish to last a lifetime Features: Reduces felt recoil and muzzle flash Constructed of tool steel with a phosphate finish For use with .30 caliber rifles with 5/8-24 threads Includes new crush washer 100% made in the U.S.A. Lifetime Warranty Palmetto State Armory stocks the widest selection of Modern Sporting Rifle parts and accessories at the best prices around!