Mossberg 590A1 Retrograde 12 Gauge 20 in. Shotgun

The Mossberg 590A1 Retrograde is a 12-gauge pump-action shotgun configured with a 20-inch heavy-walled barrel, heat shield, ghost ring sights, and a cylinder bore. Its fixed tubular magazine, top-tang safety, and established 590A1 operating system make it suitable for users seeking a practical shotgun platform for home-defense or general-purpose applications.

The configuration includes dual extractors, twin action bars, steel-to-steel lockup, and an anti-jam elevator for consistent cycling. The barrel has a Parkerized finish, and the shotgun is designated for 3-inch chambers.

Key Specifications

• The shotgun uses a 12-gauge chambering.
• The action is pump action for manual cycling.
• The barrel measures 20 inches and uses a heavy-walled design.
• The barrel includes a heat shield.
• The sight system uses ghost ring sights.
• The bore is specified as cylinder.
• The maximum chamber size is 3 inches.
• The shotgun has a top-tang safety.
• The magazine is a fixed tubular magazine.
• The length of pull is listed as 13.87 inches.

With its recognizable 590A1 configuration and focused feature set, the Retrograde provides a straightforward pump-action platform with practical sights, a robust barrel profile, and controls suited to routine handling and maintenance.

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