The Mossberg 590A1 in 12 gauge with a 20-inch barrel (brand part no. 51663-1) brings adjustable ghost ring sights to Mossberg’s duty-grade 590A1 platform for faster, more precise target acquisition. Mossberg builds this configuration around a heavy-walled barrel with a cylinder bore choke and the same dual-extractor, twin-action-bar design that has made the 590A1 a standard-issue shotgun worldwide. The shotgun feeds from a magazine with an 8+1 capacity, giving it more onboard rounds than the base 590 configuration. Among pump-action shotguns, this 590A1 favors shooters who want ghost ring precision on a proven duty platform.

Key Specifications

• Chambered in 12 gauge.
• Operates as a pump-action shotgun.
• Features a 20-inch heavy-walled barrel.
• Feeds from a magazine with an 8+1-round capacity.
• Equipped with adjustable ghost ring sights.
• Fitted with a cylinder bore choke.
• Built with dual extractors and twin action bars for duty-grade cycling.
• Overall length is 42.65 inches.
• Ships at approximately 10 pounds.

Frequently Asked Questions

What sights does this 590A1 use? Adjustable ghost ring sights for fast, precise aiming.

What is the magazine capacity? 8+1 rounds, more than the base 590A1 configuration.

Buy the Mossberg 590A1 Shotgun

Ghost ring precision on a proven duty-grade platform is exactly what this 590A1 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.