The Beretta A400 Xtreme Plus KO is a 12-gauge semi-automatic shotgun with a 26-inch Steelium Plus barrel, 3.5-inch chamber, Mossy Oak Bottomland synthetic stock, and Kick-Off MEGA recoil reduction system. It weighs 7.4 lbs and measures 51 inches overall. 
 

Key Specifications: 

• Brand: Beretta 
• Model Name: A400 Xtreme Plus KO 
• Caliber/Gauge: 12 GA 
• Action Type: Semi-Auto 
• Chamber Size: 3.5" 
• Barrel Length: 26" 
• Overall Length: 51" 
• Weight: 7.4 lbs. 
• Capacity: 2+1 rounds 
• Sights: Fiber Optic with Steel Mid-Bead 
• Safety Mechanism: Crossbolt Safety 
• Stock Material/Finish: Synthetic with Mossy Oak Bottomland Camo 
   

Detailed Features 

The Kick-Off MEGA system is a hydraulic recoil absorber built into the stock. It reduces felt impulse before it reaches the shooter, which is a real advantage when running 3.5-inch loads through a long day. The Steelium Plus barrel construction improves ballistic consistency and reduces muzzle rise. Five Optima HP Extended chokes are included, which cover the full range from tight Full to open Cylinder. Fiber optic front sight with steel mid-bead gives reference points in both good and poor light. The 26-inch barrel keeps the gun maneuverable while the Mossy Oak Bottomland camo is effective in marsh and flooded timber settings. 
 

Usage Scenarios 

• Waterfowl Hunting: 3.5-inch chamber handles magnum steel loads; the shorter 26-inch barrel is nimble for quick overhead shots. 
• Upland Hunting: At 7.4 lbs the gun carries reasonably well; the 26-inch barrel offers faster handling than a 28-inch in tight cover. 
• Sport Shooting: Consistent cycling and low muzzle rise assist in competitive clay formats.

The Beretta A400 Xtreme Plus KO in 12GA Mossy Oak Bottomland draws consistent praise for reliability in wet and muddy conditions, which is the core requirement for serious waterfowl hunters. The Kick-Off system gets specific positive mention. Owners describe noticeably reduced recoil fatigue compared to standard semi-auto shotguns, particularly when shooting heavy loads repeatedly. The Mossy Oak Bottomland finish works well in the flooded timber and marsh environments it's designed for.

Versatility across load types comes up often as a strength. The main criticisms are weight (some find 7.4 lbs tiring on long days) and price (it's at the high end of the semi-auto shotgun market). A few newer semi-auto shooters mention that the action requires some time to get used to compared to pump actions. Overall, experienced hunters who use it regularly tend to describe it as performing exactly as expected at its price point.