The Mossberg 590M is a pump-action shotgun chambered in 12 Gauge with an 18.5-inch barrel. It uses a detachable magazine feeding system and ships in a Tungsten Cerakote finish over a steel receiver that is drilled and tapped for optics. The receiver is optics-ready and the stock is a Magpul SGA synthetic with a safety-orange option noted in some configurations. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590M 
• Caliber: 12 Gauge 
• Action: Pump Action 
• Barrel Length: 18.5 inches 
• Capacity: 10+1 
• Color/Finish: Tungsten Cerakote 
   

Detailed Features 

• Detachable magazine feed accepts 10-round magazines 
• Drilled and tapped steel receiver for optic mounting 
• Ghost ring sights on some configurations 
• Magpul SGA synthetic stock 
• Tungsten Cerakote finish on barrel and receiver

Owners of the 590M tend to praise the magazine-fed design as a practical upgrade over tube-loading shotguns, especially for users who want fast reloads in a defensive or professional context. The Tungsten Cerakote finish draws consistent approval for durability and low-maintenance upkeep in the field.

The Magpul SGA stock gets mixed notes. Most find the ergonomics comfortable, but a subset of owners find the length of pull adjustment fiddly during initial setup. The drilled and tapped receiver is a genuine plus for anyone wanting to mount a red dot or low-power optic.

Value perception on the 590M Professional sits in a middle range. It costs more than a standard tube-fed Mossberg, and some buyers feel the magazine system adds complexity without a proportional reliability gain. Others consider the detachable mag the whole point and would not go back.