Gemtech ETM Muzzle Brake LENGTH 2.37 in WEIGHT 2 oz CALIBER 7.62 NATO MOUNT TYPE 5/8-24 COLOR/FINISH BLACK Unmatched reliability in alignment with ETM equipped suppressors 2.375″ long, pre-dimpled for pin and weld to 14.5″ barrel Virtually eliminates the possibility of carbon locking with a suppressor attached