The Beretta A400 Xtreme Plus KO is a semi-automatic shotgun chambered in 20 gauge with a 3.5-inch chamber and a 28-inch barrel. It holds 2+1 rounds, is drilled and tapped for optics, and comes in an Olive Drab Green finish with the Kick-Off recoil reduction stock. The A400 Xtreme Plus is built around a gas-operated action designed for reliable cycling across a wide range of loads. 
 

Key Specifications 

• Brand: Beretta 
• Model: A400 Xtreme Plus KO 
• Caliber: 20 Gauge 
• Action: Semi Auto 
• Capacity: 2+1 rounds 
• Barrel Length: 28 inches 
• Color/Finish: Olive Drab Green 
   

Detailed Features 

• 3.5-inch chamber handles heavy non-toxic waterfowl loads 
• Kick-Off recoil reduction system built into the stock 
• Drilled and tapped receiver for optic mounting 
• 28-inch barrel in Olive Drab Green finish 
• Olive Drab Green stock and forend to match

Owners of the A400 Xtreme Plus KO in 20 gauge consistently point to the Kick-Off stock as the defining feature. It noticeably softens felt recoil on magnum loads, which makes a long day on the marsh or dove field considerably easier. A few shooters feel the system adds weight they would rather not carry, but most consider it a fair trade.

The Olive Drab Green finish gets mixed reactions. Waterfowl hunters appreciate it for low-profile fieldwork, while some traditional shotgun buyers find it less appealing than wood or standard blued options. Reliability across load types is a common point of praise for the A400 platform generally.

At its price tier, the A400 Xtreme Plus KO draws buyers who are willing to spend for the recoil system and the 3.5-inch chamber. The drilled and tapped receiver is a welcome detail for those who run a red dot for turkey or predator hunting. The trigger and safety placement rarely draw complaints from experienced semi-auto shotgun users.