Mossberg 590A1 Retrograde 12 Gauge 20 Inch Shotgun

Description

Built around a pump-action design, the Mossberg 590A1 Retrograde is a 12 gauge shotgun with a 20 inch heavy-wall barrel. This configuration includes a heat shield, ghost ring sights, and a cylinder bore. We stock it for shooters who want a straightforward shotgun platform with clearly defined features.

Key Specifications

• The shotgun is chambered for 12 gauge ammunition, establishing its standard shotshell format.
• Its pump-action system uses a manually operated action for a familiar shotgun operating format.
• The barrel measures 20 inches, as specified for this 590A1 configuration.
• The heavy-wall barrel includes a heat shield as part of the listed barrel assembly.
• The chamber is rated for 3 inch shotshells.
• The sighting system uses ghost ring sights at the front and rear.
• The barrel has a cylinder bore choke configuration.
• The shotgun is configured for right-handed (RH) use.

The Retrograde configuration combines the 590A1 model designation with a heavy-wall barrel, heat shield, and ghost ring sight setup. Its fixed stock arrangement and pump-action manual of arms keep the design direct and familiar. The cylinder bore is listed as the choke configuration, while the 3 inch chamber accommodates the stated shell length. This is the 12 gauge, 20 inch Mossberg 590A1 Retrograde.