Mossberg 590A1 Magpul | 12 Gauge | 20″ Barrel | 51773

The Mossberg 590A1 Magpul Series is a pump‑action tactical shotgun built to MIL‑SPEC standards, featuring a heavy‑walled 20″ barrel, Magpul SGA stock and MOE forend. Its Parkerized finish and steel construction are specified for hard use and long service life. The XS Ghost Ring sights provide a clear, rapid sight picture for scoped or iron‑sight setups. This configuration is aimed at duty, tactical, and training applications where durability and repeatable ergonomics matter.

Product Specifications

• The manufacturer is Mossberg.
• The model is 590A1.
• The UPC is 015813517737.
• The caliber/gauge is 12 Gauge.
• The action is Pump Action.
• The barrel measures 20 inches and is heavy‑walled.
• The chamber size is 3 inches.
• The choke type is a fixed cylinder bore.
• The stock is a fixed Magpul SGA in black.
• The forend is a Magpul MOE forend designed for control and accessory compatibility.
• The sights are XS Ghost Ring sights.
• The finish is Black Parkerized.
• The weight is 7.25 lbs.
• The magazine type is tubular with a stated capacity of 8+1.

Built with service‑grade components and Magpul ergonomics, the 590A1 Magpul Series is intended for users who need a rugged, repeatable shotgun platform for duty and regular training. The SGA stock offers length‑of‑pull adjustment and a recoil‑reducing buttpad, while the MOE forend adds control and accessory mounting options. Its Parkerized steel finish and heavy‑walled barrel are specified for long service life under frequent use.

Owners and agencies commonly praise the 590A1 for its durability and reliability in duty use.

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