This Proof Research rifle comes a spiral fluted bolt, a composite stock, a Spartan carbon fiber bipod/mount, a carbon fiber threaded barrel, and it's equipped with a Nightforce NX8 2.5-20X50MM scope. 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.