A Really Bad Design Signature Series

OA Defense 2311 Pro

Gulf Borderland || 9mm || Optic Ready 

This very gun was featured at the Cerakote booth at SHOT Show 2026 and it now can be yours. 

A Really Bad Design has taken the custom Cerakote job by storm. In 2024 they perfected the Cell-Shading technique often referred to as "Borderland." Although not the first one to do it, A Really Bad Design are the best doing it. 

This is a one of one work on a OA 2311. It will not be replicated by A Really Bad Design. 

Inspired on the famous Gulf livery colors this cell shading work is unmatched. 

The OA 2311™ Pro is the full-size ported powerhouse of the OA Defense line-up. Designed and optimized for duty use and high round count range days, the OA 2311 Pro delivers maximum performance, accuracy, and reliability even under the harshest conditions. Featuring a cut & contoured slide, ported 5″ barrel, enhanced trigger, extended mag release paddle, and five mags. Fully ambidextrous controls, optic-ready slide, lightning fast cycle time, and a modular grip & magwell make make you prepared for all conditions.

Integral V-porting in the 5″ barrel and slide reduce muzzle rise with minimal sight picture obstruction, even with +P self-defense ammunition. The Pro cut lightened slide profile increases cycle speed for faster follow-up shots and decrease split times. The enhanced Pro trigger treatment yields a slightly lighter trigger pull than the standard duty model triggers, facilitating an even smoother trigger break for increased accuracy and feel. With five magazines and four slide plates included in the kit, the OA 2311 Pro arrives with everything you need to maximize your performance.

PACKAGE INCLUDES:

• OA 2311™ Pro pistol
• Custom OA Defense range bag
• (3) Magpul AMAG® 21-round magazines
• (2) Magpul AMAG® 17-round magazines
• (4) Slide Plates (3 optic mounts + iron sights)
• Incl. mounts for RMR, DPP, & RMSc footprints
• Ships with Night Fision tritium night sights
• Owners manual & safety lock

Optic, flashlight, and helmet NOT included. For illustration only. 

SPECIFICATIONS:

Optic and flashlight is NOT included.

Helmet is NOT included

For picture purposes only.

OA Defense 2311 Pro, Single Action, Semi-automatic, Metal Frame Pistol, Full Size, 9MM, 5 Ported Barrel, Matte Finish, Black, Extended Magazine Release, Enhanced Trigger, Tritium Night Sights, Optics Ready, 21 Rounds, 5 Magpul AMAG Magazines, Includes (4) Optic Mount Plate, Custom Pistol Case OA-2311-FPRO-KIT-BLK-PRT-21 The OA 2311 Pro is the full-size ported powerhouse of the OA Defense line-up. Designed and optimized for duty use and high round count range days, the OA 2311 Pro delivers maximum performance, accuracy, and reliability even under the harshest conditions. A Really Bad Design, ARBD, Borderland, Gulf