This Spike's Tactical ST-15 features a Daniel Defense DDM4 V11LW upper with an M-Lok rail, a B5 adjustable stock, a Magpul MOE K2+ pistol grip, mid-length system, an ALG Defense trigger, a BCM gunfighter extended charging handle, a 1/7 twist, and a muzzle brake. One 30-round magazine is included. 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.