The XM307 ACSW is a powerful grenade machine gun. It was designed by the U.S. Army as a product of the Objective Crew Served Weapon project and features smart shell capacity. The gun is lightweight and two men can operate it, or it can be mounted on a vehicle. The firing rate of this gun is 260 rounds per minute. The gun has a kill range of 2.187 yards and can annihilate armored vehicles, watercraft, or helicopters at 1,094 yards. It was intended to replace the MK19 automatic grenade launcher and the M2 machine gun.