The Beretta A400 RR Custom Xtreme Plus is a 12 Gauge semi-automatic shotgun with a 28-inch vent rib steel barrel and a 3 1/2-inch chamber. It has a 2+1 capacity, an Optima HP aluminum receiver, and synthetic stock furniture in DC Bayou Deview Waterfowl camo. This is a Rob Roberts Custom build on the A400 platform. 
 

Key Specifications 

• Brand: Beretta 
• Model: A400 RR Custom Xtreme Plus 
• Caliber: 12 Gauge 
• Action: Semi Auto 
• Barrel Length: 28 in 
• Chamber: 3 1/2 in 
• Capacity: 2+1 
• Color/Finish: DC Bayou Deview Waterfowl Camo 
• Stock: Synthetic 
• Receiver: Optima HP Aluminum 
   

Detailed Features 

• 28-inch vent rib steel barrel 
• 3 1/2-inch chamber 
• Optima HP aluminum receiver 
• DC Bayou Deview Waterfowl camo synthetic stock 
• Right hand configuration

Owners of the A400 RR Custom Xtreme Plus tend to praise the soft-cycling gas system, which makes it comfortable to shoot across a wide range of loads. The Rob Roberts custom work adds a camo finish that waterfowl hunters find well-suited to field and blind use.

The 28-inch barrel gets positive marks for swing and follow-through on passing shots. Some owners note the 3 1/2-inch chamber capability is useful for heavy loads in the field, though the gun handles lighter target loads equally well.

The price point for the Rob Roberts build is higher than a standard A400, and opinions split on whether the custom finish justifies the premium. Long-term owners generally report reliable function with minimal maintenance.