This Alex Pro Firearms rifle comes with one 20-round magazine, an MFT adjustable stock, a billet receiver, an ambidextrous Warhammer charging handle, an ambidextrous safety, a Proof Research carbon fiber barrel, and a muzzle brake. 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.