OA Defense 2311 Compact 9mm, 4.25 in Barrel, 2011-Style Alloy Frame, Tritium Night Sights, Optic-Cut Slide, 3x 15-Round Mags
The OA Defense 2311 Compact is a U.S.-made, 2011-platform 9mm that blends carry-ready size with duty-grade features. It uses a light, hard-coat anodized 7075-T6 aluminum frame, a DLC-finished 416 stainless linkless barrel, and a nitrocarburized tri-top slide with an optic cut. Tritium night sights, an ambidextrous thumb safety, and compatibility with SIG P320-pattern magazines round out a configuration that is both practical and modern.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape. Minor scratches and blemishes are present.
What’s Included
- OA Defense factory box
- OA Defense zippered soft pistol case
- OA 2311 owner safety manual
- 3x 15-round magazines
- Dara IWB Kydex holster
- OA 2311 optic mounting plates with mounting hardware
- Flared magazine well (installed)
- Spare Night Fision tritium front sights
The 2311 Compact runs a single-action, hammer-fired system with a linkless barrel lockup and external extractor. Controls include an ambidextrous thumb safety, a left-side magazine release, and a bilateral slide stop. Capacity is 15+1 with steel double-stack magazines that follow the SIG P320 pattern.
Materials and finishes are selected for durability and low maintenance: a DLC-finished 416 stainless 4.25 in barrel, a nitrocarburized steel slide with a tri-top profile, and a hard-coat anodized 7075-T6 aluminum frame. The skeletonized commander-style hammer and a flat-faced, lightened trigger support a consistent single-action press.
Sighting equipment is fully set up for low light with tritium 3-dot night sights, including a Night Fision tritium front sight with a high-visibility orange ring and a tritium rear. The slide features an optic cut with a cover plate, and the OA Defense optics-plate interface is included with mounting plates and hardware. The slide and sights use the SIG P-series dovetail pattern.
The polymer grip module provides molded texturing, frontstrap grooves, and a flared magazine well that is already installed. A MIL-STD-1913 Picatinny rail on the dustcover supports common weapon-mounted lights. Overall dimensions are approximately 7.75 in L x 5.10 in H x 1.40 in W, with an unloaded weight about 26–26.8 oz. Made in the USA.