MOSSBERG 51665 MODEL 590A1 RETROGRADE 12 GA 20" GHOSTRING WOOD

The Mossberg 590A1 Retrograde (51665) is a 12-gauge pump-action shotgun built to military-grade specifications and dressed in classic walnut furniture, giving tactical shotgun buyers a hard-working defensive platform with the aesthetic of Mossberg's original tactical pumps. This 12-gauge pump-action tactical shotgun is purpose-built for home defense, law enforcement training, and range use by shooters who want proven reliability wrapped in a timeless wood stock package.

Key Features

• Part number 51665
• Gauge: 12 gauge
• Chamber: 3-inch, accepts 2.75-inch and 3-inch factory shells
• Capacity: 8+1 with 2.75-inch shells, 7+1 with 3-inch shells
• Barrel: 20-inch heavy-walled, Parkerized finish with heat shield
• Stock: Checkered walnut with vented recoil pad
• Forend: Matching checkered walnut
• Receiver: Aluminum alloy, Parkerized, drilled and tapped
• Trigger guard and safety button: Steel construction
• Sights: Rear ghost ring adjustable peep, high-visibility orange front bead
• Weight: 7.25 lbs.
• Overall length: 40 inches
• Length of pull: 14 inches
• Action: Pump action
• Safety: Ambidextrous top-mounted tang safety
• Bayonet lug included

Special Features

• The 590A1 platform meets U.S. military procurement specifications, with a heavier barrel wall, steel trigger guard, and steel safety button that exceed standard civilian shotgun construction.
• Dual extractors and twin action bars work together to pull spent shells cleanly and cycle the action smoothly under hard use.
• Positive steel-to-steel lockup between the bolt and barrel extension gives this shotgun a secure, tight lock on every shot.
• An anti-jam elevator guides shells onto the carrier reliably, reducing feed interruptions during rapid cycling.
• The ghost ring rear sight and high-visibility front bead work as a fast sighting system that delivers slug-capable accuracy at defensive distances.
• The drilled and tapped receiver accepts a Picatinny rail, letting the shooter mount optics or a light without permanent modification.
• The barrel heat shield protects the support hand during extended firing strings and reinforces the classic tactical look of the Retrograde series.
• The checkered walnut stock and matching forend are fitted with a vented recoil pad and carry a grip texture that holds firm across varied conditions.

Practical Benefits

• The 20-inch heavy barrel gives you one extra round of capacity over shorter 590 variants while keeping overall length practical for indoor and vehicle use.
• Ghost ring sights let you engage targets faster than a bead-only setup and deliver the precision needed for slug work at extended range.
• The ambidextrous tang safety sits where your thumb lands naturally, so you can disengage it instantly without shifting your grip.
• The quick-change barrel system allows you to swap barrels for different applications without sending the shotgun to a gunsmith.
• Walnut furniture gives this shotgun a natural feel that synthetic stocks do not replicate, and the checkering bites into your palm when weather changes the grip equation.
• The bayonet lug opens up accessory options for those running this platform in training, competition, or service roles.
• If you are a home defense shooter who wants military-proven reliability in a shotgun that looks and feels like a classic, the Mossberg 590A1 Retrograde 51665 puts that combination in your hands.

The Mossberg 590A1 Retrograde (51665) in 12 gauge is a dependable option for defensive shooters, training programs, and collectors who demand genuine military-spec construction paired with traditional walnut furniture.