Infantry Board Service Rifle Trials
The T44 participated in a competitive service rifle competition conducted by the Infantry Board at Ft. Benning, Georgia against the Springfield T47 (a modified T25) and Fabrique Nationale's "Fusil Automatique Leger" (French for "Light Automatic Rifle"), designated T48. The T47, which did not have a bolt roller and performed worse in dust and cold weather tests than either the T44 or the T48 was dropped from consideration in 1953. During 1952–53, testing proved the T48 and the T44 roughly comparable in performance, with the T48 holding an advantage in ease of field stripping and dust resistance, as well as a longer product development lead time. A Newsweek article in July 1953 hinted that the T48/FAL might be selected over the T44. During the winter of 1953–54, both rifles competed in the winter rifle trials at U.S. Army facilities in the Arctic. Springfield Armory engineers, anxious to ensure the selection of the T44, had been specially preparing and modifying the test T44 rifles for weeks with the aid of the Armory's Cold Chamber, including redesign of the T44 gas regulator and custom modifications to magazines and other parts to reduce friction and seizing in extreme cold. The T48 rifles received no such special preparation, and in the continued cold weather testing began to experience sluggish gas system functioning, aggravated by the T48's close-fitting surfaces between bolt and carrier, and carrier and receiver. FN engineers opened the gas ports in an attempt to improve functioning, but this caused early/violent extraction and broken parts as a result of the increased pressures. As a result, the T44 was ranked superior in cold weather operation to the T48 in cold weather operation. The Arctic Test Board report made it clear that the T48 needed improvement and that the U.S. would not adopt the T48 until it had successfully completed another round of Arctic tests the following winter.
In June 1954, funding was finally made available to manufacture newly fabricated T44 receivers specially designed for the shorter T65 cartridge. This one change to the T44 design saved a pound in rifle weight over that of the M1 Garand. Tests at Ft. Benning with the T44 and T48 continued through the summer and fall of 1956. By this time, the T48/FAL rifles had been so improved that malfunction rates were almost as low as the T44.
In the end, the T44 was selected over the T48/FAL primarily because of weight (the T44 was a pound lighter than the T48), simplicity (the T44 had fewer parts), the T44's self-compensating gas system, and the argument that the T44 could be manufactured on existing machinery built for the M1 rifle (a concept that later turned out to be unworkable). In 1957, the U.S. formally adopted the T44 as the U.S. infantry service rifle, designated M14.
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