The Mossberg 590A1 PRO is a pump-action shotgun chambered in 12 Ga with an 18.5-inch barrel and a Marine Silver finish on both barrel and receiver. It has a 6+1 round capacity and ships with ghost ring sights and a MAGPUL stock. The corrosion-resistant Marine Silver treatment makes it suited for wet environments. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590A1 PRO 
• Caliber: 12 Ga 
• Action: Pump Action 
• Capacity: 6+1 
• Barrel Length: 18.5 in 
• Color/Finish: Marine Silver 
   

Detailed Features 

• 18.5-inch Marine Silver barrel with matching Silver receiver 
• Ghost ring rear sight for fast target acquisition 
• MAGPUL furniture 
• 6+1 round capacity

Owners of the Mossberg 590A1 PRO in Marine Silver tend to appreciate the corrosion-resistant finish, particularly those in coastal or humid climates. The combination of ghost ring sights and MAGPUL furniture gets consistent praise for practical usability out of the box.

The 590A1 PRO's pump reliability is a common talking point. Owners note the action cycles smoothly even under hard use, and the heavy-walled barrel adds confidence in durability. A few users find the weight noticeable on extended carry, which is the usual trade-off for the beefier build.

Value opinions are mixed. Some buyers feel the Marine Silver package commands a premium that is hard to justify unless you genuinely need the corrosion resistance. Others see it as the right tool for the job and are satisfied paying the difference over a standard blued 590.