The Mossberg 590R Stand-Off is a pump-action shotgun in 12 Gauge with an 18.5-inch barrel and Flat Dark Earth Cerakote on the receiver. It has a 6-round capacity and a Picatinny rail for optics or accessories. The stock is an adjustable synthetic in black with a 3-inch chamber. 
 

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: Flat Dark Earth Cerakote 
   

Detailed Features 

• Flat Dark Earth Cerakote finish on receiver 
• Picatinny rail for optic or accessory mounting 
• Adjustable synthetic stock in black 
• Stand-Off barrel configuration 
• 3-inch chamber

Owners of the Mossberg 590R Stand-Off in FDE appreciate the Flat Dark Earth Cerakote for its resistance to wear and its subdued appearance. The combination of FDE receiver with a black adjustable stock is noted as a practical two-tone look that does not feel overdone.

The Picatinny rail is a consistent positive, giving owners flexibility to run lights or an optic without extra parts. Some owners prefer this Stand-Off configuration over the heat-shield variant because the rail gives more mounting options, though a few note that the stand-off barrel is a niche fit and not for everyone.

The 590R trigger is a common talking point; it works but is not refined, and most dedicated users consider an aftermarket upgrade worthwhile over time. The 6+1 capacity and adjustable stock are generally accepted as appropriate for a defensive-configured pump shotgun, and the Mossberg 590 action is widely regarded as robust for the price point.