.30 Carbine cartridge. This request ultimately resulted in the development of a scaled-down version of the ArmaLite AR-10, called the ArmaLite AR-15 rifle. In 1958, ArmaLite submitted ten AR-15s and one hundred 25-round magazines for CONARC testing. The tests found that a five to seven man team armed with AR-15s had the same firepower as an 11-man team armed with M14s and soldiers armed with AR-15s could also carry three times more ammunition than those armed with M14s (649 rounds vs. 220 rounds). The AR-15 was found to be three times more reliable than the M14 rifle. However, General Maxwell Taylor, then Army Chief of Staff, "vetoed" the AR-15 in favor of the M14. In 1959, ArmaLite—now frustrated with the lack of results and suffering ongoing financial difficulties—sold its rights to the AR-10 and AR-15 to Colt. Colt era After acquiring the AR-15, Colt promptly redesigned the rifle to facilitate mass production. Based on the final ArmaLite design, most notably, the charging handle was re-located from under the carrying handle, like the earlier AR-10 to the rear of the receiver, like the later M16 rifle. Colt then renamed and rebranded the rifle "Colt ArmaLite AR-15 Model 01". After a Far East tour, Colt made its first sale of Colt ArmaLite AR-15 rifles to Malaya on September 30, 1959. Colt manufactured their first batch of 300 Colt ArmaLite AR-15 rifles in December 1959. Colt would go on to market the Colt ArmaLite AR-15 rifle to military services around the world. In July 1960, General Curtis LeMay, then Vice Chief of Staff of the United States Air Force, was impressed by a demonstration of the AR-15 and ordered 8500 rifles. In the meantime, the Army would continue testing the AR-15, finding that the intermediate cartridge .223 (5.56 mm) rifle is much easier to shoot than the standard 7.62×51mm NATO M14 rifle. In 1961 marksmanship testing, the U.S. Army found that 43% of AR-15 shooters achieved Expert, while only 22% of M14 rifle shooters did so. Also, a lower recoil impulse, allows for more controllable automatic weapons fire. In the summer of 1961, General LeMay was promoted to Chief of Staff of the United States Air Force, and requested an additional 80,000 AR-15s. However, General Maxwell D. Taylor, now Chairman of the Joint Chiefs of Staff, (who repeatedly clashed with LeMay) advised President John F. Kennedy that having two different calibers within the