Mossberg 590A1 Features The Mossberg 590A1 is built with steel-to-steel lockup dual extractors and twin action bars for a level of durability that has made it the standard for military and law enforcement pump shotguns worldwide cycling reliably even under the harsh conditions and heavy round counts that duty use demands. Its heavy-walled 18.5 barrel and Accu-Choke system installed with a cylinder bore choke deliver consistent patterns for close-range defensive use backed by the 3 chamber and 6+1 capacity that give the platform real staying power in a fight. A top-mounted ambidextrous safety and metal trigger guard keep the shotgun operable for shooters of either dominant hand under stress and the metal trigger guard alone stands up to gloved-hand manipulation where a polymer guard would not. The clean-out magazine tube simplifies maintenance a detail valued by agencies that depend on the 590A1 for duty use and want a shotgun that can be field-stripped and serviced quickly between shifts. The drilled and tapped receiver accepts optics for shooters who want to add a red dot for faster target acquisition while the RMSc-compatible footprint referenced in Mossberg s optic-ready configuration extends this flexibility further without requiring a separate adapter plate. An M-LOK compatible forend with accessory mounting slots lets owners add lights or foregrips without a separate rail adapter keeping the overall package lean while still configurable to a given duty or home defense role. The parkerized finish resists corrosion and wear standing up to the demands of duty carry and storage in humid or harsh environments where a lesser finish would begin to pit. Backed by decades of Mossberg s reputation for battle-ready pump shotguns the 590A1 delivers a rugged optic-ready platform built for serious home and personal defense use. Mossberg 590A1 Specifications Brand: Mossberg Model: 590A1 Gauge: 12 Gauge Chamber: 3 Barrel Length: 18.50 Barrel Finish: Black Parkerized Receiver Description: Drilled & Tapped Choke Configuration: Accu-Choke Chokes Included: Cylinder Forend Type: M-LOK Capacity: 6+1 Weight: 7 lbs Available At: GrabAGun