The Beretta A400 Xtreme Plus KO is a 12-gauge semi-automatic shotgun built for waterfowl hunting, with a 30-inch barrel, 3.5-inch chamber, and Realtree Max-7 camouflage finish throughout. 
 

Key Specifications 

• Brand: Beretta 
• Model Name: A400 Xtreme Plus KO 
• Action: Semi-Automatic 
• Gauge: 12 GA 
• Barrel Length: 30 inches 
• Capacity: 2+1 rounds 
• Chamber Size: 3.5 inches 
• Overall Length: 53 inches 
• Weight: 6.76 lbs 
• Finish: Realtree Max-7 Camo 
   

Detailed Features 

 
The fixed Kick-Off stock runs a hydraulic damper in the buttstock that cuts felt recoil, which matters when shooting magnum loads over a long waterfowl hunt. The Optima-Choke HP system accepts five chokes (F, IM, M, IC, C) for pattern adjustment depending on distance and target. The aluminum receiver keeps the gun at 6.76 lbs even with the 30-inch barrel. Bead sights work for the quick, instinctive shooting style most waterfowlers use. The Realtree Max-7 pattern was designed for late-season marsh and flooded timber environments. 
 

Usage Scenarios 

• Waterfowl hunting in marshes, flooded timber, and open water 
• Sporting clays where a longer barrel aids swing-through 
• Any high-volume shooting scenario where recoil management extends comfort over time

The A400 Xtreme Plus KO Camo in 30" gets strong marks from dedicated waterfowl hunters.

The camo finish is purpose-appropriate and well-received. Realtree Max-7 blends into late-season and flooded timber setups, and shooters say it works as intended in the field.

The Kick-Off system gets consistent praise. Most owners say it delivers on reduced recoil, and for those shooting a lot of 3" and 3.5" magnums over a season, the difference is meaningful.

The gas-operated system handles a wide range of loads without manual adjustment, which gives it broad versatility across hunting applications beyond waterfowl.

Adjustable stock and shims allow customization of fit for drop and cast, which improves comfort and accuracy for individual shooters.

The main complaints center on price -- it's at the high end of production semi-auto shotguns. Some users also mention the 30-inch barrel can be awkward in tight cover or when navigating blinds. A short break-in period with some ammunition types is mentioned occasionally.