This Ruger PC Carbine features a Glock magwell, an FDE Magpul Backpacker stock, and a threaded barrel with protector. Purchase includes one 17-round PMAG for Glock magwell, the original black Ruger stock and forend, and a Ruger magwell with one 10-round magazine. 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.