The Mossberg 590A1 Professional Series Compact is a 12 Gauge pump-action shotgun with an 18.5-inch barrel and a 6+1 round capacity. It has a Cerakote polymer ceramic coating over the metal parts, a synthetic stock with adjustable length of pull, and an optic-ready receiver that accepts a micro dot with an RMSc footprint once the cover plate is removed. Sights are a metal rear Ghost-Ring paired with a front fiber optic. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590A1 Professional Series Compact 
• Caliber: 12 Gauge 
• Action: Pump Action 
• Capacity: 6+1 
• Barrel Length: 18.5 in 
• Material: Synthetic 
• Finish: Cerakote 
• Color: Orange and Gray 
   

Detailed Features 

• Optic-ready receiver takes a micro dot with an RMSc footprint once the plate is off 
• Metal rear Ghost-Ring and front fiber optic for fast target acquisition 
• Top-mounted ambidextrous safety for quick, intuitive operation 
• Compact synthetic stock with adjustable length of pull 
• Clean-out magazine tube design simplifies maintenance 
• Cerakote polymer ceramic coating adds everyday durability

The 590A1 line has a strong reputation among owners for reliability, and the Professional Series Compact carries that over with praise for the Cerakote coating holding up to regular carry and use. The metal safety and trigger guard over the more common polymer parts is frequently cited as a reason people trust it for hard use.

Ergonomics get mixed feedback: the compact stock with adjustable length of pull works well for a range of body sizes, but some shooters with larger frames find the shorter stock less comfortable for extended range sessions. The Ghost-Ring sights are popular for fast target acquisition, and the optic-ready receiver is welcomed by owners who want to add a micro dot without a separate mount.

Aftermarket support for the 590A1 platform is broad, since Mossberg's pump shotguns have been around long enough that furniture, lights, and slings are easy to find. The orange and gray color scheme draws mixed opinions, with some liking the visibility and others preferring a more traditional black finish.