The LANTAC Drakon AK-47 Muzzle Brake with Dead Air Keymount Suppresor Mount is precision machined, hardened to 48Rc and nitride finished for enhanced corrosion resistance. It features a patented gas handling system that reduces muzzle rise and recoil to zero, meaning that the only recoil felt by the shooter is from the movement of the carrier and buffer within the buffer tube. Its unique Short Energy Pulse system reduces length of recoil so that repeating shot energy cannot overlap and knock the shooter off target. Full auto fire is possible with massively reduced recoil and muzzle climb, meaning that all shots fall on target. The DGNAK47B Brake/ Mount is threaded 14x1 LH and is designed to be used with 7.62x39mm (Russian Short) Caliber ammunition only. FeaturesComes with appropriate shim set for timimg the brake / mount. X2 .34mm, X3 .22mm, X3 .11mm, X4 .075mm & x1 2mm Washer.Serial Numbered for Quality Control Notes:Lantac recomends the use of Rocksett thread locker that is not in...