OA Defense 2311 Full Size | 9mm | 5″ | 17+1

The OA Defense 2311 is a full-size, optic-ready 9x19mm pistol built around a 7075 aluminum frame and a 17-4 stainless steel slide. It ships as a kit that includes multiple optic mounting plates, tritium night sights, and three 17-round OA magazines, reflecting a focus on duty and service use. For an optic under $1,000 that pairs cleanly with the included RMR footprint plate, consider a Trijicon RMR Type 2 for durable, low-profile red-dot performance.

Applications for this platform include law-enforcement/duty use and competition/precision target work where a full-size sight radius and accessory options are valued.

Product Specifications

• The caliber is listed as 9x19mm.
• The barrel measures 5.00 inches.
• The action is Semi-Auto.
• Capacity requires verification due to conflicting source data; verification required. See notes.
• The frame material is 7075 aluminum.
• The slide material is 17-4 stainless steel.
• The grip is black polymer.
• The slide is optic-ready and ships with multiple mounting plates for RMR and similar footprints.
• The sights are Night Fision tritium night sights with multiple heights included for optic compatibility.
• The trigger pull is listed as 4.0–4.5 pounds.
• The unloaded weight is listed as 29 ounces.
• The kit includes three 17-round OA magazines and accessory plates, an iron sight cover plate, a cable safety lock, owner’s manual, and a custom range bag.
• The model is 2311.
• The safety configuration is ambidextrous.
• The UPC is 850055310001.

This OA 2311 kit delivers a full-size 9x19mm platform with service-grade materials and accessory readiness straight from the factory. The combination of a 7075 aluminum frame, 17-4 stainless slide, night sights, and included optic plates makes it a functional option for shooters who want a configurable duty or competition pistol that’s ready for optics and tailored setups. Its accessory kit and component choices emphasize practical versatility and long-term serviceability.

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