Firing from an open bolt, and featuring a heavier-than-normal bolt carrier group as well as a shortened ... M231” when adopted by the Army. Like the M16, it was chambered for the 5.56x45mm ...

PHOENIX, AZ--(Marketwired - September 25, 2017) - Young Manufacturing, a U.S.-based firearms parts manufacturing company, has been manufacturing bolt carrier groups for the AR-15 and M16 rifles ...

But unlike Armalite’s AR-18 the rest of the design is practically unchanged from the M16, retaining the recoil spring in the buffer tube and the cylindrical bolt carrier group of the M16 ...

But unlike Armalite’s AR-18 the rest of the design is practically unchanged from the M16, retaining the recoil spring in the buffer tube and the cylindrical bolt carrier group of the M16 ...