This video provides an expert comparison of four distinct .50 caliber machine gun barrels: the M3AC (aircraft, high cyclic rate, air-cooled), the M2HB (ground mount, lower cyclic rate), the M2WC (ground/naval, sustained fire, water-cooled), and the M85CA (General Electric design, selectable rate, used on M60 tanks). The instructor highlights key differences in application, cooling, and performance.
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