The Mossberg 590 is a rugged, military-grade 12-gauge pump-action shotgun engineered with reliability and hard use in mind. Introduced in the late 1980s as an upgraded version of the Mossberg 500 series, it features a heavy-walled barrel, antijam elevator, dual extractors, twin action bars, top-mounted ambidextrous safety, and steel-to-steel lockup—ensuring maximum durability and consistent function under demanding conditions
