This RT-15 comes with one 30-round magazine, M-Lok handguard, a muzzle device, 1/8" barrel twist, and it's equipped with a Trijicon ACOG 4X32 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.