Mossberg 590 A1 Adjustable-6 Shot.

590A1 platform. Stock choices include a 6-position adjustable tactical stock, pistol-grip Cruiser models, standard full-size polymer stock, or a polymer Speedfeed model that holds four additional shells in the stock. Every 590A1 Special Purpose model features a drilled and tapped receiver, factory-ready for Picatinny rail, scope base or optics installation. Barrels lengths include 18-1/2" (with 5+1 magazine capacity) or 20" (with 8+1 magazine capacity), all with cylinder bore. Depending on the model, you'll find a choice of 3-Dot, Ghost Ring, or basic front bead sights. The 590A1 SPX™ model comes fully loaded out of the box with these features: a factory-mounted Picatinny rail, LPA/M16-Style Ghost Ring combination sight set, and removable M9 bayonet/scabbard combination. Other 590A1 versions include the 590A1 Mariner model with Marinecote-finished barrel and receiver for added corrosion resistance for marine applications, extreme wet weather or humid environments and a reduced (13") length-of-pull 590A1 Compact model perfect for smaller-stature shooters. 590A1 shotguns are also available in 14" Class III Restricted models for law enforcement and military personnel.