The Lantac Dragon SilencerCo ASR Muzzle Brake - Black for .223/556 is a high-precision AR rifle muzzle device built in the USA from Hardened 4140 Gun Steel with a Black Nitride QPQ finish, designed to work with 5.56/.223 caliber ammunition and threaded 1/2-28 UNEF right-hand for secure mounting. It features Lantacs patented gas handling system to dramatically reduce muzzle rise and recoil so the shooter feels only the movement of the carrier and buffer, complemented by the Short Energy Pulse system that shortens recoil duration to prevent shot energy overlap and keep repeat shots on target. When used with the SilencerCo ASR quick mount system, it installs compatibility with SilencerCo Saker, Omega suppressors, and the Blast Shield, broadening versatility while maintaining performance. The DGN556B-ASR Brake/ Mount is precision-timed with an included shim set (timing shims) and ships with a full complement of spacers and washers to ensure proper alignment, including X2 0.34mm, X3 0.22mm, X3 0.11mm, X4 0.075mm, and a 2mm washer, and it is serial-numbered for quality control. This unit is not a flash hider, is California legal, and is designed for AR rifles with a compact 2.570-inch length, 0.824-inch body diameter, and 4.0-ounce weight.