The M13A1, also known as simply "Big Gun", is a belt-fed Light Machine Gun chambered in 7.62x51mm NATO rounds. It incorporates many features to reduce recoil, such as the stock padding, a bipod, and a muzzle break. It uses Colt Leaf Sights which can be folded to add optics to the Picatinny rails. It comes equipped with a carrying handle to help reduce the strain on the user. It has a fire rate of 700 RPM and is capable of being mounted on Helicopters and other vehicles.