This Daniel Defense DD4 Carbine/M4A1 RIII includes the original case, one 32-round magazine, and four 30-round magazines, and features a mid-length gas system, a 1:7 twist barrel, a pinned and welded suppressor-ready flash hider, ambidextrous controls, and an Elftmann Tactical ELF Match Pro trigger. 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.