The Beretta A300 Ultima KO is a 12 gauge semi-automatic shotgun with a 3" chamber, 28-inch barrel, 47.6-inch overall length, and 7.6 lb weight. Capacity is 2+1. The Realtree Max-7 camouflage finish covers the exterior. 
 

Key Specifications 

• Brand: Beretta 
• Model Name: A300 Ultima KO 
• Caliber: 12 Gauge 
• Chamber Length: 3" 
• Action Type: Semi-Automatic 
• Capacity: 2+1 (total of 3 rounds) 
• Barrel Length: 28" 
• Overall Length: 47.6" 
• Weight: 7.6 lbs 
• Sights: Fiber Optic Front / Mid-Bead 
• Stock Type: Fixed Kick-Off 
• Safety Mechanism: Cross-Bolt 
• Finish Color/Pattern: Realtree Max-7 Camouflage 
   

Detailed Features 

The enlarged bolt handle and bolt release work with gloves on or in adverse conditions. A wider stepped rib paired with fiber optic sights allows quick bead-on-target alignment for moving game or clay targets. 
 
The patented Kick-Off recoil reduction system uses hydraulic dampeners to cut felt recoil by up to 70%. That's a meaningful number for anyone shooting heavy waterfowl loads across a long morning in a blind. 
 
The gas-operated action includes a self-cleaning piston and compensating exhaust valve, which helps cycle both light and heavy loads without manual adjustment.

Beretta A300 Ultima KO owners in Realtree Max-7 have a lot to say, mostly positive, with some practical caveats.

Reliability in variable weather is the most common praise. Hunters running it through wet, cold, or muddy conditions report consistent cycling across different load types.

The recoil management system draws genuine appreciation. Shooters who put heavy rounds through it in a single session notice the difference versus a standard gas gun.

The Realtree Max-7 camo pattern is purpose-built for waterfowl environments and gets favorable comments from hunters who care about pattern-to-habitat matching.

Construction quality is consistently rated positively. The materials feel durable and the fit and finish match the price point.

On the critical side, at 7.6 lbs, the shotgun is heavier than some alternatives, which becomes a factor on long walk-in hunts. Price runs higher than budget semi-autos with similar features. New shooters sometimes mention a learning curve with the controls. Aftermarket accessory selection specific to this model is somewhat limited.