The M2A1 with Quick Change Barrel (QCB) is an enhancement to the M2 .50 Caliber Machine Gun. It offers Soldiers increased performance as well as new features and design improvements that make it easier and safer to use. The M2A1 features a fixed headspace and timing configuration, flash hider and removable carrying handle to increase the performance of the battle-proven M2. The M2A1 speeds target engagement and improves survivability and safety. It reduces the time required to change the barrel while eliminating the timely procedure of setting headspace. The flash hider reduces muzzle flash by 95 percent, making the M2A1 less detectable in darkness.