Presma CNC Bayonet Muzzle Brake fits 223 /5.56 1/2"x28 free Crush Washer Jam Nut

Presma CNC Bayonet Steel Muzzle Brake fit .223 /5.56 1/2"x28 - Free Crush Washer & Jam Nut - One piece high quality steel construction, CNC machined - Easy install / release - Reduce muzzle rise for better performance - Competition grade Measurements: 1.5" x 0.87" x 4.09", 4.7 ounces - Fits .223/5.56, Thread 1/2"X28 - QPQ finish, Corrosion and Wear Resistance. .