The M37 is an improved, air-cooled variant of the Browning 1919 machine gun, specifically designed for tank mounting and addressing issues like single-side feeding and part durability. Key enhancements include a captive recoil spring, dual-side feed capability, a relocated charging handle, and an improved rear assembly with a manual safety. Originally chambered in .30-06, later M37E1 models used 7.62 NATO.
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