This lot includes two original U.S. military-issue M14 magazines, both marked "BRW / S-I"—denoting manufacture by Borg-Warner under contract at their Simpson, Iowa facility. These magazines were produced in the late 1950s and early 1960s for use with the M14 rifle, the standard-issue battle rifle for U.S. forces during the early stages of the Vietnam War. Constructed of parkerized steel with spot-welded seams and steel followers, these 20-round magazines were built to meet strict military specifications. The "BRW / S-I" marking is among the most desirable for collectors, as it represents one of the original and relatively scarce U.S. government contract runs before later mass production by other contractors. Both magazines remain in surplus-used condition with fully functional springs and intact feed lips. They show expected wear from field use but no significant damage. A great addition to any Cold War or Vietnam-era U.S. military collection, especially for enthusiasts of the M14 rifle platform