Description
The OA Defense 2311 Full Size 9mm 5″ 17+1 Optic Ready is a duty-grade pistol built for shooters who demand reliability and precision out of the box. Chambered in 9x19mm, it pairs a 5.00-inch barrel with an optic-ready slide and a 7075 aluminum frame, delivering a stable platform for range work, competition, or daily carry. This kit ships with multiple optic mounting plates, three 17-round magazines, and Night Fision tritium night sights in various heights, so you can hit the ground running without chasing after parts.
| Manufacturer | OA Defense |
|---|---|
| Model | 2311 Full Size |
| Material | 7075 aluminum frame, steel slide, stainless barrel |
| Compatibility | 9mm Luger, 17+1 capacity, accepts standard 2011 magazines |
| Finish | Black anodized frame, nitride slide |
| Weight | 34 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Optic-Ready Slide with Multiple Plates — Direct-mount compatibility for Trijicon RMR, Holosun, Leupold DeltaPoint Pro, and others. Per OA Defense, the kit includes five plates, so you don’t need to buy adapters separately.
- 5.00-Inch Barrel with Full-Length Guide Rod — The extended barrel and full-length guide rod improve accuracy and recoil control, giving you a 5-inch sight radius for faster follow-up shots.
- Night Fision Tritium Night Sights (Various Heights) — Pre-installed sights allow immediate low-light use, with suppressor-height options to co-witness with optics. This saves you $100+ on aftermarket sights.
- Three 17-Round Magazines — You get three flush-fit magazines in the box, enough for a full range session or match without constant reloading. Each magazine is built with steel bodies and impact-resistant base pads.
- 7075 Aluminum Frame with Integral Grip Safety — The frame is CNC-machined from billet 7075, stronger than forged 6061, and includes a grip safety that works with the thumb safety for a familiar 2011 manual of arms.
Who It’s For
This pistol is for shooters who want a factory-built 2011-style gun without the custom lead times. It fits duty carry, USPSA Limited Optics division, and defensive use. If you prefer a metal-frame 9mm with a flat trigger, optic cut, and tritium sights out of the box, this is your platform.
Pros & Cons
Pros: Ready to shoot with included plates and sights; 7075 aluminum frame is lighter than steel but still rigid; three magazines reduce upfront cost; full-length guide rod aids reliability.
Cons: The grip texture may feel aggressive for concealed carry without a cover garment. Also, the trigger is a single-action with a 4.5-lb pull, which some shooters prefer lighter for competition.
Comparison vs. Competing Models
| Feature | OA Defense 2311 Full Size | Zev Technologies OZ9 | Agency Arms Syndicate |
|---|---|---|---|
| Frame Material | 7075 aluminum | Stainless steel with polymer grip | 7075 aluminum |
| Barrel Length | 5.00″ | 4.49″ or 5.2″ | 5.0″ |
| Optic System | 5-plate kit, direct mount | RMR-cut, no plates included | RMR/Holosun cut, 1 plate |
| Magazines Included | 3 | 2 | 2 |
| Street Price | $2,249.99 | $2,599+ | $2,899+ |
| Night Sights | Night Fision tritium | None (suppressor-height only) | None (suppressor-height only) |
FAQ
Does this pistol come with a holster?
No, the OA Defense 2311 does not ship with a holster. However, the 5-inch barrel and full-size frame fit most 2011-style holsters designed for 5-inch 1911/2011 pistols. Brands like Safariland and Red Hill Tactical offer compatible options.
Can I use Glock magazines in this gun?
No, the OA Defense 2311 uses 2011-style double-stack magazines. The included 17-round magazines are proprietary to the 2311 platform. Aftermarket options from MBX or Atlas Gunworks may fit, but stick with OA Defense mags for best reliability.
What is the trigger pull weight?
Per OA Defense specs, the trigger pull is approximately 4.5 lbs with a crisp break and short reset. It is a single-action trigger with an aluminum flat shoe.
Is this pistol legal in all 50 states?
This pistol ships to all 50 states, but check your state’s magazine capacity laws. Some states limit magazines to 10 rounds; we ship compliant magazines where required.
Buy the OA Defense 2311 Full Size 9mm 5″ 17+1 Optic Ready
This pistol delivers a ready-to-shoot 2011 experience with factory support and no custom wait. Order yours today and get it shipped to your FFL within 1-2 business days.
✓ Nationwide delivery (all 50 states)
✓ Ships 1-2 business days
✓ 30-day returns
✓ Secure checkout
See more options in: 9mm Pistols | Optic-Ready Handguns | 2011-Style Pistols
Last updated: April 2026
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