The Mossberg 590R Stand-Off is a pump-action shotgun in 12 Gauge with an 18.5-inch barrel finished in OD Green Cerakote on the barrel and receiver. It has a 6-round capacity and a Picatinny rail for optic or accessory mounting. The stock is an adjustable synthetic in black. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590R Stand-Off 
• Caliber: 12 Gauge 
• Action: Pump Action 
• Capacity: 6+1 rounds 
• Barrel Length: 18.5 inches 
• Color/Finish: OD Green Cerakote 
   

Detailed Features 

• OD Green Cerakote finish on barrel and receiver 
• Picatinny rail for optic or accessory attachment 
• Adjustable synthetic stock in black 
• Stand-Off barrel configuration 
• 3-inch chamber

Owners of the Mossberg 590R Stand-Off in OD Green tend to highlight the Cerakote finish as a practical upgrade for field use and weather exposure. The OD Green color is popular among buyers who want a muted, low-visibility look without painting the gun themselves.

The Picatinny rail gets positive marks for flexibility, letting owners mount lights, optics, or other accessories without additional drilling. Stand-Off barrel owners often note the barrel is well-suited to close-quarters use, though some would prefer a heat shield option similar to other 590R configurations.

The 590R platform in general draws mixed trigger feedback; the pull is functional but some owners consider it a first upgrade. At the 6+1 capacity, most find the gun appropriately sized for its intended role, and the adjustable stock is frequently cited as a convenience for sharing the gun among different-sized shooters.