Tiger Rock AR-10 .308 5/8"x24 Thread 3" Muzzle Brake Fake Can Mock -Over Barrel Exp.Thread 3 in without Gas Holes. By pushing the muzzle media forward the gases are compressed and act like a band aid for the shooter. Tiger Rock Muzzle Brakes shave off unnecessary weight that is added to the barrel. The shaved weight reduces the Muzzle Energy of the barrel thus giving the shooter a false sensation of having nothing back there while in fact there is plenty of muzzle energy to work with. As muzzle devices become more efficient at reducing muzzle rise less gas is lost in the form of gas and more importantly burns less ammo. The Tiger Rock Fake Can Mock-Over Barrel Exp.Thread actually screws into the upper receiver so fitting is not necessary to remove the part if it is being installed by a professional gunsmith. Installation of the Tiger Rock Muzzle Brake is very simple. It just slides over the threads and is held in place by a set screw. Remove and install to chamber and reinstall. Do not over torque the device or over-torque it. Specifications for Tiger Rock AR-10 .308 5/8"x24 Thread Muzzle Brake Fake Can Mock -Over Barrel Exp.Thread: Manufacturer: Tiger Rock Condition: New Package Contents: Tiger Rock AR-10 .308 5/8"x24 Thread Muzzle Brake Fake Can Mock -Over Barrel Exp.Thread Tiger Rock F58-3: AR-10 .308 5/8"x24 Thread 3" Muzzle Brake Fake Can Mock -Over Barrel Exp.Thread 3 in without Gas Holes