The Mossberg 590A1 Pro is a pump-action shotgun chambered in 12 gauge with an 18.5-inch barrel and 6+1 round capacity. It has a 3-inch chamber, Tungsten Cerakote finish, and ghost ring sights. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590A1 Pro 
• Caliber: 12 Gauge 
• Action: Pump Action 
• Capacity: 6+1 
• Barrel Length: 18.5 in 
• Color/Finish: Tungsten Gray 
   

Detailed Features 

• Pump-action 12-gauge platform with 18.5-inch barrel 
• 6+1 round capacity with 3-inch chamber 
• Tungsten Cerakote finish 
• Ghost ring sights 
• 13 LOP stock configuration

The 590A1 Pro draws strong support from owners who want a pump-action shotgun built to a tighter spec than the standard 590A1. The Tungsten Cerakote finish is consistently praised for its durability and resistance to field conditions, and the fit and finish on the Pro designation get noticed immediately out of the box.

Ghost ring sights are a frequent positive. Owners coming from bead-sight shotguns note the improvement in target acquisition, and the 13 LOP stock configuration suits shooters who prefer a shorter pull. The 3-inch chamber gives flexibility in load selection without adding bulk.

The main complaint is cost relative to the standard 590A1. Some owners argue the Pro's premium is justified by the finish and sights alone, while others find the base 590A1 sufficient for their purposes. The 6+1 capacity with an 18.5-inch barrel is a common trade-off discussion for those who want more rounds in a compact package.