The 590A1 SPX M-LOK is the most fully equipped factory 590A1 configuration, combining M-LOK forend, ghost ring sights, Picatinny rail, and bayonet lug. Mil-spec heavy barrel and metal trigger group throughout. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 9 Year introduced: 2019, USA Weight: 128 oz Overall length: 41" Status: Active Military use: Yes Intended use: Military, Law Enforcement, Tactical