It features our 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. With the addition of the SilencerCo ASR quick mount system it is now possible to mount the SilencerCo Saker, Omega Suppressors and the Blast Shield. The DGN556B-ASR™ Brake/ Mount is threaded 1/2-28UNEF and is designed to be used with 5.56/.223 Caliber ammunition only. Comes with appropriate shim set for timimg the brake / mount. X2 .34mm, X3 .22mm, X3 .11mm, X4 .075mm & x1 2mm Washer. We recomend the use of Rocksett thread locker that is not included. Does NOT work with the BMD, Blast Mitigation Device. NOT considered a flash hider – California legal. Made in the USA. SPECIFICATION:Material: 4140 GUN STEEL Finish: Black Nitride QPQDimensions: L: 2.570′, DIA Body: 0.824” THREADS: 1.120’’.Weight: 4.0ozThread: 1/2-28 UNEF R/HSerial Numbered for Quality Control Comes with appropriate timing shim set.Made in the USA.