The oa 2311 pro is the 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.Integral v-porting in the 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.Includes four side plates, three optic mounts (rmr, dpp and holosun k/rmsc footprints) and iron sight cover plate, 5 15rd magazines, range bag and safety lock.Frame Finish: BlackAction: SAOCaliber: 9mm LugerBarrel Length: 4.25"Capacity: 15rdSafety: AmbidextrousGrips: PolymerSlide Description: Optic Ready/Serrated