OA Defense 2311 Compact Pro 9mm, 4.25 in DLC Barrel, Optics-Ready, Tritium Sights, 17+1, Two-Tone Tan/Black
The OA Defense 2311 Compact Pro stands out as a modern, 1911-platform double-stack pistol built around a Commander-length 4.25-inch barrel and a compact footprint. It combines a DLC-coated 416 stainless barrel, a 7075-T6 aluminum frame, tritium night sights, and an optics-ready slide with interchangeable plates. This example features a tan slide over a black grip module for a clean two-tone look and is rollmarked "OA DEFENSE DAYTON, NV."
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: Minor use wear is present, including visible scuffing and scratching near the mag-well.
What’s Included
- Original soft case (tan)
- 5x 17-round magazines
- Optic mounting plates
- Additional front sight post
- Owner paperwork
The Compact Pro format pairs a 4.25-inch (Commander-length) barrel with a compact, double-stack 9mm layout for 17+1 capacity in a carryable size. The two-tone finish uses a tan slide and black grip module for clear visual contrast.
The barrel is 416 stainless steel with a DLC coating, and the pistol uses a linkless tilting barrel operating system. This configuration is designed around dependable lockup and durable surface protection at the bore and exterior.
The slide includes rear cocking serrations and a top lightening window, with forward-side relief cuts that do not open through the slide. It is optics-ready with an optic cut and ships with interchangeable mounting plates. Sights are tritium night sights with a high-visibility front ring and square-notch rear, marked "NF H3," and the dovetails follow SIG P-series dimensions.
The 7075-T6 aluminum frame integrates a MIL-STD-1913 Picatinny rail with three slots and uses an ambidextrous manual thumb safety. The pistol accepts SIG P320-pattern double-stack magazines; five 17-round steel magazines are included.