The Mossberg 590 Shockwave is a 12-gauge pump-action shotgun built around a 14.4" heavy-walled barrel and a fixed Raptor bird's-head grip. At 26.5" overall and 5.3 lbs, it is legally classified as a firearm rather than a shotgun, which makes it legal in many jurisdictions where a short-barreled shotgun would require NFA paperwork. The Flat Dark Earth Cerakote finish resists corrosion well. 
 

Key Specifications 

• Brand: Mossberg 
• Model Name: 590 Shockwave FDE 
• UPC: 015813506533 
• Gauge: 12 GA 
• Action Type: Pump Action 
• Chamber Size: 3" 
• Capacity: 5 rounds (3" shells), up to 6 rounds total 
• Barrel Length: 14.4 inches (heavy-walled) 
• Overall Length: 26.5 inches 
• Weight: 5.3 lbs 
• Finish Color: Flat Dark Earth Cerakote 
   

Detailed Features 

 
The pump action cycles reliably across a wide range of shell lengths. The 14.4" barrel keeps the overall package short enough to work in confined spaces. The Raptor grip absorbs some of the recoil impulse and gives you a firm hold, though the lack of a stock means felt recoil is sharper than a full-size shotgun and takes some practice to manage. The ambidextrous tang safety sits at the top of the receiver, accessible from either side. Cerakote on every exposed surface handles rough weather and storage conditions better than standard bluing.

Owners of the Mossberg 590 Shockwave FDE are generally enthusiastic about what it does well, with a few consistent caveats.

The compact size is the most-cited strength. People who need something maneuverable in a vehicle, hallway, or storage space appreciate that 26.5" footprint. It comes up constantly as a truck gun or home defense option where a full-length shotgun is impractical.

Reliability draws consistent praise. Mossberg's pump-action track record carries over, and owners report feeding reliably with buckshot, slugs, and lighter target loads.

Customization is a topic that generates a lot of discussion. The platform accepts lights, sights, and grip modifications, and many owners seem to treat the stock configuration as a starting point.

Recoil is the main practical concern, especially among new shooters. Without a stock to distribute recoil, 12-gauge loads hit harder at the hands and wrists. Most experienced owners adjust their technique and load selection, but it is a real consideration.

Legal status comes up regularly. The "firearm" classification rather than "shotgun" has implications that vary by state, and buyers tend to do their homework before purchasing.

The FDE Cerakote finish gets positive comments for both looks and durability.

Price-to-performance ratio is generally seen as favorable compared to other compact tactical shotguns.