OA Defense 2311 Pro 9mm 5-inch Ported Full-Size Kit

About this product

The OA Defense 2311 Pro 9mm 5-inch Ported Full-Size Kit is a duty-ready, ported 2011-platform pistol engineered to minimize muzzle rise during rapid-fire. It represents a significant refinement of the classic 1911/2011 design, incorporating a modern optics-ready slide, a modular polymer grip, and a 7075-T6 aluminum frame designed for sustained high-round-count use. We’re at a point where factory-built guns must compete directly with custom shop builds for serious use, and this kit is Ironclad Armory’s answer for shooters who need a complete system.

What is the OA 2311 Pro used for?

The OA 2311 Pro is used for duty carry, sustained training sessions, and competition where reliability and a flat-shooting platform are critical. It is explicitly designed for high-volume shooting with its ported 5-inch barrel, generous magazine count, and included optic plates. This is not a casual plinking pistol; its 2.9lb single-action trigger weight (as tested) and aggressive slide serrations are purpose-driven for defensive and competition shooting where split times matter.

How does the OA 2311 Pro compare to the FN 545 Tactical?

Compared to the polymer-framed striker-fired FN 545 Tactical, the OA 2311 Pro offers a superior trigger for precision work and faster follow-up shots due to its single-action design and barrel porting. The 2311 Pro’s aluminum frame provides a more stable shooting platform for recoil management at the cost of increased weight (46.1 oz unloaded vs the FN’s approximate 33 oz), making it better for competition shooters but heavier for all-day duty carry. The 2311 Pro also ships complete with 5 magazines, while the FN typically includes 3.

What does it weigh and what are the dimensions?

The OA 2311 Pro with an empty 21-round magazine weighs 46.1 ounces (2.88 lbs), with an overall height of 5.9 inches and an overall length of 8.7 inches. The slide width is 1.25 inches, and the grip width varies from 1.3 to 1.45 inches depending on the installed backstrap. This places it solidly in the full-size duty pistol category; it is 4.2 inches longer in overall length than a compact option like a Glock 19 and requires a holster designed for 2011-style frames with an optic cut.

Who is this NOT for?

This kit is not for new shooters, budget-conscious buyers, or anyone seeking a compact concealed carry pistol. The $2599 price point, aggressive porting, and single-action-only operation create a steep learning curve and significant ongoing ammunition costs. If you are looking for a reliable, no-frills home defense or first pistol, consider a more traditional and less expensive option like a Stevens 334 Rifle in a capable rifle caliber.

What's in the box?

In the box, you receive the complete pistol, three 21-round magazines, two 17-round magazines, four optic mounting plates (for Trijicon RMR/SRO, Leupold DPP, Holosun 507C/Venom, and Shield RMSc footprints), Night Fision tritium night sights, a hard pistol case, a cleaning rod, and a field manual. This kit is notable for including all mounting plates upfront, saving approximately 8-10 weeks of lead time versus ordering them separately from the manufacturer post-purchase.

Is the OA 2311 Pro worth it at $2599?

At $2599, the OA 2311 Pro Kit is worth it for serious shooters who require a turn-key competition or duty-ready 2011 and value the included accessories at over $450. You are paying for a complete system that eliminates the need for immediate aftermarket upgrades. For a shooter who wants a similar quality out-of-the-box shotgun for sporting clays without the NFA considerations of a duty pistol, the Stevens 555 Sporting 20 Gauge represents a different kind of value in the sub-$1000 range. The 2311 Pro justifies its cost through performance and completeness, not through being an entry-level firearm.