The OA Defense 2311 Compact Pro is a semi-automatic pistol chambered in 9mm with a 4.25-inch barrel. It has a black finish, optic-ready slide, and ships with 15-round magazines. 
 

Key Specifications 

• Brand: OA Defense 
• Model: 2311 Compact Pro 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 4.25" 
• Capacity: 15 
• Color/Finish: Black 
   

Detailed Features 

• 4.25-inch barrel in a compact format 
• Optic-ready slide cut 
• Black finish throughout 
• 15-round magazine capacity 
• 2311-pattern double-stack frame

Owners of the OA Defense 2311 Compact Pro are typically drawn to the 2311 platform for its combination of 1911-style ergonomics with higher-capacity double-stack magazines. The compact sizing is seen as a practical middle ground, and the optic-ready cut is viewed as a forward-thinking feature that adds real utility.

Build quality feedback is mixed. Some owners praise the fit and finish, while others note that OA Defense is a newer name in the market and parts support is still developing. The 9mm chambering in a 2311 frame draws positive comments for being a natural pairing.

For shooters already familiar with single-stack 1911 platforms, the 2311 Compact Pro is generally praised for the intuitive controls and natural grip angle. The 15-round capacity is frequently cited as one of the main reasons buyers chose it over traditional compact options.