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.

Features :

• 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,
• ,Dimensions: 1-3/4" length, .75" diameter,
• Weight: 1.7 ounces
• Made in the USA by Swan Manufacturing.