This optic-ready OA Defense 2311 Pro features a ported barrel and slide, an ambidextrous thumb safety, and Night Fision Hi-Viz night sights. Purchase includes the original box, soft case, owner's manual, two 17-round magazines, three 21-round magazines, and optic plates. Get the best bang for your buck when you get a Certified Used Firearm. When you see the Certified Used stamp on any of our firearms, you can be confident that you're getting exactly what you want - a gun only in very good to excellent condition and held to the highest quality standard. All Certified Used Guns come with a 'no questions asked' return policy.