The OA Defense 2311 Pro combines the extended frame of the 2311 system with duty-driven enhancements engineered for hard use and high round counts. The longer sight radius and increased grip surface support controlled repeatable shooting while the DLC-treated 5 barrel and tuned internals promote durability recoil management and consistent cycling. A contoured slide; enhanced trigger; extended magazine release paddle; ambidextrous controls; an optic ready slide and a modular grip with 7035 aluminum magwell provide adaptable control and accuracy. Includes a Magpul 17rd and 21rd AMAG magazines owners manual cable lock.