The Mossberg 590S Compact is a 12 Gauge pump-action shotgun with an 18.5-inch barrel and a 3-inch chamber. It holds 9+1 rounds and ships with a drilled and tapped receiver and a synthetic stock in a Flat Dark Earth and black finish. 
 

Key Specifications 

• Brand: Mossberg 
• Model: 590S Compact 
• Caliber: 12 Gauge 
• Action: Pump Action 
• Capacity: 9+1 rounds 
• Barrel Length: 18.5 inches 
• Chamber: 3 inch 
• Color/Finish: Tan / Flat Dark Earth and Black 
   

Detailed Features 

• 18.5-inch barrel in a compact pump-action configuration 
• 9+1 round capacity 
• Drilled and tapped receiver for optic mounting 
• Synthetic stock construction 
• Flat Dark Earth and black two-tone finish

Owners of the Mossberg 590S Compact point to the drilled and tapped receiver as a practical advantage, making optic mounting straightforward without additional gunsmithing. The 9+1 capacity in an 18.5-inch platform is a common positive, especially for home defense roles.

The pump action itself draws the typical 590-series comments: the action feels deliberate and positive, which some users prefer over lighter-feeling designs. A few note that the compact size can make loading under stress require more attention to technique compared to longer-magazine configurations.

On the Tan/FDE finish, most owners find the two-tone look practical and durable. The synthetic stock is treated as a non-issue by the majority, though a small segment would prefer a more adjustable stock option. Value relative to competing pump shotguns in this capacity range is generally viewed favorably.