The Century Arms Centurion A4 is a semi-automatic shotgun chambered in 12 GA with a 20-inch barrel and a 5-round capacity. It is finished in OD Green and accepts 3-inch shells. 
 

Key Specifications 

• Brand: Century Arms 
• Model: Centurion A4 
• Caliber: 12 GA 
• Action: Semi Auto 
• Capacity: 5 rounds 
• Barrel Length: 20 inches 
• Color/Finish: OD Green 
   

Detailed Features 

• Semi-automatic operation with 20-inch barrel 
• 5-round capacity 
• OD Green finish 
• 12 GA chambering

Owners of the Centurion A4 in OD Green often point to its practical field finish as a reason for the purchase. The color holds up reasonably well in outdoor environments, and the 20-inch barrel keeps the package manageable. A few buyers note the finish is durable but not as refined as premium Cerakote options.

On the range, the Centurion A4 cycles reliably with standard loads, though some owners report needing a break-in period before the action smooths out. The 5-round capacity is adequate for most applications, and the gas operation keeps felt recoil moderate for a 12 GA platform.

Value feedback is generally positive. The Centurion A4 is not a budget-corner-cut gun, but it sits below higher-end semi-auto shotguns in price. Aftermarket support is limited compared to more established platforms, which some owners find frustrating when looking for accessories.