The ArmaLite AR-18 is a gas-operated rifle chambered for 5.56×45mm NATO ammunition. The AR-18 … 展开

Soon after the adoption of the 7.62×51mm NATO M14 rifle in 1957, the U.S. Army's Continental Army Command (CONARC) began an investigation of small-caliber, high-velocity (SCHV) rifles as an offshoot of the military's exi… 展开

Overall, the new AR-18 rifle is much more conventional than previous ArmaLite designs, although it uses the relatively new stamped steel construction from its predecessor, the AR-16. Despite being pioneered by th… 展开

The AR-18 was put into limited production at ArmaLite's machine shop and offices in Costa Mesa, California. A semi-automatic version of the AR-18 known as the AR-180 was later produced for the civilian market between 1969 a… 展开

Unlike the AR-15/M16, the AR-18 did not see substantial sales success, and was never officially adopted by any country as its standard service rifle. The reasons for this are unclear, but may have had something to do … 展开