The Beretta A400 Xtreme Plus KO is a semi-automatic 20-gauge shotgun with a 3" chamber and a Mossy Oak Bottomland finish. It weighs 6.76 lbs with a 28" barrel and a 51" overall length. 
 

Key Specifications 

• Model: A400 Xtreme Plus KO 
• Gauge: 20 GA 
• Capacity: 2+1 rounds 
• Action: Semi-Auto 
• Barrel Length: 28 inches 
• Choke Configuration: Optima-Choke HP (F, IM, M, IC, C included) 
• Overall Length: 51 inches 
• Weight: 6.76 lbs 
• Stock Material: Synthetic with Fixed Kick-Off technology 
• Sights: Bead 
• Safety Feature: Crossbolt 
   

Detailed Features 

 
The Fixed Kick-Off stock uses a hydraulic buffer in the pad to absorb recoil energy, which shortens recovery time and is noticeable even with heavier 20-gauge loads. Five Optima-Choke HP tubes are included across the full spread of constrictions from cylinder to full, so you can tune for ducks, upland, or clays without buying additional chokes. A chrome-plated trigger handle corrosion better in wet conditions. The Mossy Oak Bottomland finish is a full dip treatment over the synthetic stock and metal surfaces. 
 

Usage Scenarios 

At 6.76 lbs the gun is easy to carry on long hunts. The Bottomland camo works best in swampy or marsh settings. The 51" overall length is a standard handling package for a 28" barrel semi-auto, and the gas system cycles reliably across a wide range of loads.

Owners of the Beretta A400 Xtreme Plus KO 20GA in Mossy Oak Elite generally report solid performance. The lightweight construction and smooth cycling get the most attention, especially from hunters who carry the gun all day. The KO recoil system makes a real difference compared to fixed-stock semi-autos in this gauge.

The Mossy Oak Elite camo is praised for its natural-environment concealment. Most users see the Beretta build quality as worth the price.

Some feedback touches on cost relative to other 20-gauge options. A few buyers note that some loads need a break-in period before cycling perfectly, and a handful mention the stock fit requiring minor adjustment for optimal cheek weld. Overall the gun earns consistently positive marks for field performance.