The Griffin Armament DUAL-LOK Minimalist Muzzle Brake integrates 60 machined mounting position grooves, which is doubled by the mount's two locking positions, hence the double entendre DUAL-LOK. How is this achieved? The mounts' two locking positions are machined out of phase of one another by 3 degrees which provides the 120 effective locking positions and ensures a tightly mounted and locked suppressor. When the suppressor is installed, only one of the two positions will generally function by allowing the spring to push the locking collar rearward over the splines. Additionally the brake features compensating ports that help reduce muzzle climb while assisting in reducing felt recoil. The Minimalist Brake weighs 2.3 ounces and is less than an 1.5" long, adding minimal weight and length compared to that of most competing suppressor mounts. The lighter weight reduces suppressor system weight while making the host firearm barrel lighter and more responsive to the sh...