The Beretta A400 RR Custom Xtreme Plus is a semi-automatic shotgun chambered in 12 Gauge with a 3.5-inch chamber and a 28-inch vent rib steel barrel. It has a synthetic stock, an Optima HP aluminum receiver, and a 2+1 round capacity. The Rob Roberts Custom version is finished in DC Southern Refuge waterfowl camo. 
 

Key Specifications 

• Brand: Beretta 
• Model: A400 RR Custom Xtreme Plus 
• Caliber: 12 Gauge 
• Action: Semi Auto 
• Capacity: 2+1 
• Barrel Length: 28 in 
• Color/Finish: DC Southern Refuge 
   

Detailed Features 

• 3.5-inch chamber for full magnum loads 
• 28-inch vent rib steel barrel with Optima HP choke system 
• Optima HP aluminum receiver 
• Synthetic stock in DC Southern Refuge waterfowl camo 
• Rob Roberts Custom configuration

Owners of the A400 RR Custom Xtreme Plus generally rate the gas system highly, noting it cycles a wide range of loads without adjustment. The Rob Roberts Custom build adds a waterfowl-specific finish that sits well with hunters who spend time in the marsh, though a few note the camo pattern feels niche outside dedicated duck hunting.

Ergonomics draw consistent positive comments. The synthetic stock handles wet conditions well, and the aluminum receiver keeps the overall weight down compared to steel-frame competitors. Some shooters find the grip geometry takes a round or two of adjustment coming from other platforms.

On value, the A400 platform commands a premium, and the Rob Roberts Custom layer adds to that cost. Most owners feel the price reflects the build quality, but budget-minded buyers occasionally question whether the camo finish alone justifies the upcharge over a standard A400 Xtreme Plus.