with added molybdenum-chromium. Harrington & Richardson M14 production used AISI 8620 steel, as well, except for 10 receivers milled from AISI 1330 low-carbon steel and a single receiver made from a high-nickel alloy steel Deployment After the M14's adoption, Springfield Armory began tooling a new production line in 1958, delivering the first service rifles to the U.S. Army in July 1959. Long production delays, though, resulted in the 101st Airborne Division being the only unit in the army fully equipped with the M14 by the end of 1960. The Fleet Marine Force finally completed the change from M1s to M14s in late 1961. Springfield Armory records reflect that M14 manufacture ended as TRW, fulfilling its second contract, delivered its final production increment in the fiscal year 1965 (1 July 1964 – 30 June 1965). The Springfield archive also indicates the 1.38 million rifles were acquired for just over $143 million, for a unit cost of about $104. The M14 was developed to replace four different weapons: the M1 Garand, the M3 submachine gun, the M1 carbine, and the M1918 Browning automatic rifle (BAR). The intention was to simplify the logistical requirements of the troops by limiting the types of ammunition and parts needed to be supplied, but replacing all these weapons proved to be an impossible task; the M14 was deemed "completely inferior" to even the World War II M1 Garand in a September 1962 report by the U.S. Department of Defense comptroller. The cartridge was too powerful for the submachine gun role, and the weapon was simply too light to serve as a light machine gun replacement for the M1918 BAR. The rifle was unwieldy in the thick brush of Vietnam due to its length and weight, and the traditional wood stocks made of walnut and birch tended to swell and expand in the heavy moisture of the jungle, adversely affecting accuracy. Fiberglass stocks were produced to resolve this problem, but the rifle was discontinued before the fiberglass stocks could be distributed for field use. With 2,560 ft·lbf (3,463 J) of muzzle energy, the power of the 7.62×51mm NATO cartridge was valued for its excellent range and good cover penetration, but the powerful cartridge also deemed the weapon to be virtually uncontrollable in fully automatic fire, so most M14s were permanently set to semiautomatic fire only to avoid wasting ammunition in combat. Although marred by numerous shortcomings, the rifle