This Umlaut Industries U4 features a JP upper receiver, a Star15 fixed stock, a Magpul MOE+ pistol grip, buffer spring, an Aero Precision stainless steel gas tube, a 15.5" M-Lok handguard, and a stainless steel .223 Supermatch barrel with muzzle. Two 30-round Pmags are 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.