This .223 Rem / 5.56 NATO Radial Port Muzzle Brake muzzle brakes design reduces felt recoil and muzzle movement. It is made from alloy steel with a black oxide finish to complement most firearms. Installs with a 11/16" open end wrench or crescent wrench.
Torque the brake to 15-20 ft-lbs. - no crush washers are required
,This brake is compatible with AR-556® rifles and other .223 Rem / 5.56 NATO caliber firearms with ½"-28 muzzle threads,