The M2E2 Quick Change Barrel (QCB) Kit enhances the M2 with new features and design improvements that make the weapon easier and safer to use. The kit features fixed headspace and timing reduce the time required to change the barrel and eliminate the need to reset headspace. The quick change barrel itself has a removable carrying handle that provides soldiers with a more expedient and safer way of changing barrels. The barrel also has a flash hider that reduces muzzle flash, making the M2 night friendly. The kit was incoprorated into the type standardized M2A1 design, which also featured a modified bolt and trigger block. By Spring 2011, all new production weapon were to be built to the M2A1 standard and older weapons would be retrofitted witht he QCB Kit.
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