The Mossberg 590M Pro is a pump-action 12 Gauge shotgun with an 18.5-inch tungsten gray Cerakote barrel and a Magpul SGA stock in safety orange. It has a 10+1 capacity and a steel receiver that is drilled and tapped for optics mounting. The rifled barrel carries a 1:36 twist and a 2.75-inch chamber, built for slug-style shooting at close to mid-range distances. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590M Pro 
• Caliber: 12 Gauge 
• Action: Pump 
• Capacity: 10+1 
• Barrel Length: 18.50" 
• Weight: 7 lbs 
• Barrel Finish: Tungsten Gray Cerakote 
• Receiver Material: Steel 
   

Detailed Features 

• Fiber optic ghost ring sights for fast target acquisition 
• Magpul SGA stock finished in safety orange for a stable, controllable grip 
• Steel receiver, drilled and tapped, for mounting optics 
• Ambidextrous safety for use from either shoulder 
• 1:36 twist rifled barrel with a 2.75-inch chamber

Owners of the Mossberg 590 line generally trust the pump action to run without fuss, and the 590M Pro carries that reputation with its Cerakote-finished barrel and drilled-and-tapped receiver. The tungsten gray coating gets noted for holding up to handling wear better than a plain matte finish, though a few owners wish the coating extended further down the receiver.

The Magpul SGA stock draws mixed reaction: most like the adjustable length of pull and cheek weld it gives over a factory stock, but a handful find the safety orange color polarizing outside of range use. The ghost ring sights are popular with shooters who want fast target acquisition without adding an optic right away.

Value-wise, the 590M Pro sits above a base 590 because of the Cerakote and Magpul furniture, and most owners consider that a fair trade for not having to source and install those parts separately. Aftermarket support for the 590 pattern is broad, so parts, sights, and stocks are easy to swap later.