The Beretta A400 Xtreme Plus KO is a semi-automatic shotgun built for waterfowl hunters and sporting shooters. The A400 series handles the demands of wet, cold conditions and keeps cycling reliably across a wide range of loads. 
 

Key Specifications 

• Brand: Beretta 
• Model Name: A400 Xtreme Plus KO 
• Caliber: 20 Gauge 
• Action: Semi-Auto 
• Capacity: 2+1 rounds 
• Barrel Length: 28 inches 
• Chamber Size: 3 inches 
• Overall Length (OAL): 51 inches 
• Weight: 7.40 lbs 
• Sights: Bead sight 
• Stock Material: Synthetic with Fixed Kick-Off system 
• Trigger Type: Chrome-Plated 
• Safety Mechanism: Crossbolt safety 
• Finish Color: Black with Grey accents 
   

Detailed Features 

 
The Optima-Choke HP system accepts five interchangeable chokes (F, IM, M, IC, C), letting you dial in your pattern for whatever you're shooting at. The 28" vent rib barrel is made from Beretta's Steelium material, which runs a cold-hammer-forged bore for consistent patterns. The fixed Kick-Off stock absorbs recoil through a hydraulic damper built into the buttstock, cutting felt recoil noticeably and making faster follow-up shots easier. At 7.40 lbs, the gun is manageable for a full day in the blind. The crossbolt safety is standard and easy to work with gloves on. 
 

Usage Scenarios 

• Waterfowl hunting: the semi-auto action and choke system handle ducks and geese well 
• Sporting clays and skeet: the Steelium barrel delivers tight, consistent patterns under competition pressure 
• Any high-volume day where recoil fatigue becomes a factor

The A400 Xtreme Plus KO 20 GA draws generally positive feedback with a few recurring criticisms.

Reliability comes up constantly. Owners report it cycles a wide range of ammunition cleanly, including lighter target loads, which matters in a 20-gauge semi-auto.

The Kick-Off system is the most-discussed feature. Shooters who are recoil-sensitive or who plan extended sessions specifically seek it out, and most say it works as advertised.

Ergonomics get good marks overall. The gun feels balanced, and the adjustable stock shims let you dial in drop and cast for a proper fit.

The 20-gauge format itself is a plus for shooters who want lighter carry weight and lighter recoil while still hunting effectively.

On the downside: price is the most common complaint. Some feel it sits high relative to competing semi-autos. A few note it runs slightly heavier than expected given the 20-gauge platform, which may matter on long walks. Some also mention needing a short break-in period before it feeds lighter loads without issue. Finish options are limited, and a handful of buyers wish for more camo choices.