Oa Defense 2311 Pro Full Size Frame 9mm Luger 21+1 5" Black DLC Ported Barrel, Black Lightening Cut/Optic Cut/Serrated Steel Slide & Aluminum Frame w/Picatinny Rail, Black Modular Grip, Ambidextrous, 5 Mags 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; fully ambidextrous controls; optic-ready slide and a modular grip & magwell. Includes range bag, safety lock, four slide plates- three optic mounts for RMR, DPP & RMSc footprints and iron sights, three 21rd and two 17rd magazines.