The Beretta A300 Ultima KO is a semi-automatic shotgun chambered in 20 Gauge with a 28-inch vent rib barrel and a 3-inch chamber. It has a 3-round capacity and ships with the Kick-Off recoil reduction system. The receiver is drilled and tapped, and the finish is Mossy Oak Original Shadow Grass throughout. 
 

Key Specifications 

• Brand: Beretta 
• Model: A300 Ultima KO 
• Caliber: 20 Gauge 
• Action: Semi Auto 
• Capacity: 3 rounds 
• Barrel Length: 28 inches 
• Color/Finish: Mossy Oak Original Shadow Grass 
   

Detailed Features 

• 3-inch chamber with 28-inch vent rib barrel 
• Kick-Off recoil reduction system 
• Drilled and tapped receiver for optic mounting 
• Mossy Oak Original Shadow Grass finish on stock and forend 
• 3-round capacity

Owners of the A300 Ultima KO in 20 Gauge praise the Kick-Off system as a genuine recoil reducer rather than a marketing claim. Longer shooting sessions in the field feel noticeably softer, which younger or recoil-sensitive shooters especially appreciate. The 28-inch vent rib barrel suits birds at typical field distances well.

The Mossy Oak Original Shadow Grass pattern is divisive. Waterfowl and upland hunters who hunt in grass or marsh terrain find it practical, while others prefer a more neutral finish. The drilled and tapped receiver is a practical touch for those who want to add optics without extra gunsmithing.

The A300 Ultima KO earns its reputation as a working field gun rather than a show piece. The 3-round capacity is standard for hunting configurations. Some owners note that the gas system benefits from cleaning after sustained use with lighter loads, and that aftermarket support is more limited than on domestic platforms.