Description
The OA Defense 2311 Compact Plus 9mm 17rd — 4.25″ Barrel is a purpose-built everyday carry pistol that bridges the gap between full-size capacity and compact concealability. Built on an aluminum frame with an ambi-friendly layout, this optic-ready handgun ships with three 17-round magazines and a Plus Kit for a flush-fit grip. If you’re looking for a 9mm that carries like a compact but shoots like a full-size, this is it.
| Manufacturer | OA Defense |
|---|---|
| Model | 2311 Compact Plus |
| Material | Aluminum frame, steel slide (per manufacturer specs) |
| Compatibility | OA Defense 2311 series, accepts full-size magwell with Plus Kit |
| Finish | Black hard-coat anodized frame, DLC-coated slide |
| Weight | 27.2 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Plus Kit for Flush-Fit 17-Round Mags — The included Plus Kit lets the 17-round magazine sit flush with the grip, so you get duty-size capacity in a compact package. No snag, no gap, no compromise.
- Fully Ambidextrous Controls — Slide stop, thumb safety, and magazine release are mirrored on both sides. Left- or right-handed, you operate it the same way under stress.
- Optic-Ready Slide with Night Sights — Direct-mount footprint for micro red dots, plus tritium night sights as a backup. You can run irons-only or co-witness with an optic.
- Aluminum Frame with Modular Grip — The frame is lightweight but stiff, and the grip panels are swappable. Adjust the texture and palm swell to fit your hand without buying a new gun.
- 4.25″ Barrel with 1:16 Twist — That barrel length hits the sweet spot for velocity and concealment. According to OA Defense specs, it’s optimized for 115-147gr defensive loads.
Who It’s For
This one’s for the daily carrier who wants 17+1 rounds without printing like a full-size. It’s also for the shooter who trains with both hands and expects ambi controls out of the box. If you’re running a 1911 platform but want modern capacity and optics, the 2311 Compact Plus fits that lane.
Pros / Cons
- Pros: High capacity in a compact frame, ambi controls, modular grip, night sights included, Plus Kit for flush-fit mags.
- Cons: The Plus Kit adds some grip length — it’s not a true subcompact. Also, aftermarket holsters are still catching up to the 2311 platform, so you may need to order custom.
Comparison
| Feature | OA Defense 2311 Compact Plus | Zev Technologies OZ9 Compact | Agency Arms AOS Glock 19 |
|---|---|---|---|
| Caliber | 9mm | 9mm | 9mm |
| Capacity | 17+1 (flush-fit) | 15+1 (standard) | 15+1 (standard) |
| Barrel Length | 4.25″ | 4.0″ | 4.02″ |
| Frame Material | Aluminum | Polymer | Polymer |
| Optic Ready | Yes (direct mount) | Yes (RMR footprint) | Yes (Agency AOS system) |
| Ambidextrous Controls | Full ambi | Ambi slide stop only | Ambi slide stop only |
| Price | $2,099.99 | $1,899.99 | $2,199.99 |
The OA Defense edges out the Zev OZ9 in capacity and ambi controls, and undercuts the Agency Arms AOS on price while delivering a metal frame. If you prefer a polymer grip, the OZ9 is lighter, but the 2311 Compact Plus gives you a steel-and-aluminum platform with 17-round flush-fit mags.
FAQ
Does the OA Defense 2311 Compact Plus come with the Plus Kit installed?
No, it ships with the Plus Kit separate. You install it yourself — it takes about 5 minutes and requires no special tools. The gun also includes a standard compact grip module if you want to run shorter mags.
What optics fit the slide cut?
The slide is cut for the RMR footprint, so it accepts Trijicon RMR, Holosun 407C/507C, and similar. You can also mount a Shield RMSc with an adapter plate (not included).
Are the magazines interchangeable with other 1911/2011 platforms?
No, these are OA Defense proprietary magazines. They are designed specifically for the 2311 series and will not fit standard 1911 or 2011 frames. However, the included Plus Kit ensures a flush fit with the compact grip.
Trust & Delivery
- ✅ Nationwide delivery to all 50 states
- ✅ Ships within 1-2 business days
- ✅ 30-day return policy
- ✅ Secure checkout with encrypted payment
Browse more: Semi Auto Handguns | Compact Handguns | Optic-Ready Pistols
Last updated: April 2026
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