This Spike's Tactical ST-15 includes one 20-round magazine, Rock River telescoping buttstock, Magpul vertical foregrip, and an A2 birdcage on the threaded barrel, and is equipped with a Sightmark M-Spec red dot 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.