Oa Defense 2311 Pro Plus w/Kit Compact Frame 9mm Luger 17+1 4.25" Black DLC Ported Barrel, Black Lightening Cut/Optic Cut/Serrated Stainless Steel Slide, Black Aluminum Frame w/Picatinny Rail, Gray Metal Module Grip, 5 Mags The OA 2311 Pro Plus 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. The Plus Kit option configures the pistol with a full size magwell to change the overall grip length and flush fit. Includes four side plates, three optic mounts RMR, DPP and Holosun K/RMSc footprints and iron sight cover plate, 5 17rd magazines, range bag and safety lock.