This Shadow Systems DR920 includes the original box, owner's manual, seven 17-round magazines, and two backstraps, and features a spiral-fluted threaded barrel and front night sight, and is equipped with a Holosun HS507C X2 optic. 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.