The Lantac Drakon SilencerCo ASR Muzzle Brake - Black for 7.62x39mm combines Lantacs patented gas handling system with the SilencerCo ASR quick mount framework to dramatically reduce muzzle rise and recoil, delivering near-zero felt recoil as the shooter experiences only the carrier and buffer movement, while the Short Energy Pulse system shortens the recoil arc to prevent shot timing from overlapping and throwing off aim. This DGNAK47B-ASR brake/mount is threaded 14x1 LH and designed for use with 7.62x39mm ammunition, and it ships with a complete timing shim set (X2 .34mm, X3 .22mm, X3 .11mm, X4 .075mm, plus one 2mm washer) to optimize alignment, stability, and repeatable accuracy. Made from 4140 gun steel with a Black Nitride QPQ finish, it measures 2.570 inches in length, features a 0.824 inch body diameter and 1.120 inch mount, and weighs 4.0 ounces for a low-profile, durable enhancement to your rifle. It is California legal, NOT a flash hider, and is compatible with the SilencerCo Omega Suppressor and Blast Shield via the ASR system; Rocksett thread locker is recommended for secure installation, and it is proudly made in the USA.