the late 1990s. Produced and delivered for testing at the Fort Bragg sniper school. M21 and M25 sniper rifles The M21 and M25 are accurized sniper models of the M14, assembled with more care and precision than is standard. Commercial production Federal Ordnance From 1984 to 1991, Federal Ordnance of South El Monte, California, sold a semiauto version of the M14 rifle. Initially named the M14 or M14A, the rifle used an aftermarket semiauto receiver fitted with surplus USGI M14 parts. All receivers were machined from castings of AISI 8620 alloy steel. Except for the first 50 receivers, the castings were supplied by Electro Crisol Metal, S.A., of Santander, Spain, then imported to the US for heat treatment, finish machining, and exterior phosphate treatment. M14 and M14A receivers were heat-treated using the carburizing process by a firm in Santa Ana, California, followed by finish machining on a CNC machine at Federal Ordnance in South El Monte. Federal Ordnance M14 and M14A receivers were heat-treated and carburized according to USGI M14 requirements. Each completed production rifle was proof fired, then tested for functioning by firing three rounds. USGI parts and bolts were used extensively in Federal Ordnance rifles through at least serial number 88XX. In 1989, Federal Ordnance renamed the rifle the M14SA and M14CSA. Rifles in the 93XX serial range and higher have modified receivers designed to accept Chinese-made bolts, barrels, and other parts owing to a shortage of original USGI components. About 51,000 complete Federal Ordnance M14 rifles and 60,000 or more receivers were manufactured before production was halted in late 1991. Norinco Norinco manufactures versions of the M14 rifle known as the M14S (Sporter) and the M305. The two versions of the M305 are M305A/B, one with the same barrel as the regular M14 and one with a short barrel. The M305A is an M14 chambered to fire 7.62x39 ammo. and the M305B is an M14 with an 18.5-inch barrel and chambered to fire in 7.62 NATO caliber. Copies of the select-fire and semiauto versions of the M14 were also made by Norinco. These rifles were banned from U.S. importation in 1994 due to a Clinton-era prohibition on PRC-made firearms. They were commonly sold and were popular in Canada for hunting and target shooting until they were reclassified as prohibited firearms on May 1, 2020. Production of these M14s were contracted out to Yunnan Xiyi Industry Company Limited