Features a Tri-Picatinny rail forend, 20 inch heavy wall barrel, metal trigger guard and safety, clean-out tube. Ghost ring sight. Parkerized barrel finish. Cylinder choke. Six-position aluminum tube adjustable stock. Nine shot.
Own the same Mossberg 590A1 shotguns serving with distinction around the world.
With its rock solid reputation on the streets and on the battlefield, the Mossberg® 590A1 has become the choice for the modern duty shotgun. Men and women in uniform need a rugged, dependable firearm they can rely on day in and day out, no matter the conditions. Mossberg’s 590A1 shotguns have posted the credentials and track record over several decades to earn their trust. Previously offered almost exclusively to law enforcement agencies and military organizations, Mossberg now offers civilians 590A1 Special Purpose models built to the same rigorously-tested specifications demanded by those in uniform.
Specifications that include a heavy-walled parkerized barrel, metal trigger guard assembly, metal safety button, and an upgraded magazine tube that can easily be opened for cleaning and is readily adaptable for a magazine extension. The receiver-mounted safety is convenient for right or left-handed shooters; simply push the button forward and you’re ready to fire. In addition, every Mossberg Special Purpose shotgun features a host of proven Mossberg features like an anti-jam elevator, dual extractors for reliable feeding, and positive shot shell extraction and ejection. The result? A rugged, dependable shotgun you can count on-just like the pros do.
Variety and adaptability are hallmarks of the 590A1 platform, with tactical configurations offered to suit any need. 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 for quick and easy reloading. 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 deluxe-equipped 590A1 SPX model comes fully loaded out of the box with the features you want: 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. Contact us for more information.
- Category : Tactical Shotguns
- Action : Pump
- Gauge : 12 Gauge
- Barrel Length : 20.0″
- Capacity : 8+1
- Chamber : 3″
- OAL : 36.12″
- Weight : 7.5 lbs
- Stock Description : 6-Position Adjustable Aluminum Black
- Metal Finish : Black
Frequently Asked Questions – Mossberg Model 590A1 Tri-Rail 12 Ga 20" Barrel Six-Position Adjustable Stock 8 Round Mossberg
- How fast does this ship?
- Ships in 1‑3 business days to your licensed D.C. FFL dealer after purchase and registration.
- Do I need registration?
- Yes. DC requires firearm registration, including a mandatory 10‑day waiting period after purchase approval from MPD before pickup. Handguns require registration, magazines <=10 rounds.
- Is this legal in D.C.?
- Yes, provided it complies with D.C. law (registered, no assault features, magazine ≤10 rounds).
- Is the Mossberg Model 590A1 Tri-Rail 12 Ga 20" Barrel Six-Position Adjustable Stock 8 Round Mossberg suitable for me?
- This Mossberg Model 590A1 Tri-Rail 12 Ga 20" Barrel Six-Position Adjustable Stock 8 Round Mossberg is popular for uses like guns.
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