This CMMG MkGs includes one 31-round magazine, an SB adjustable pistol brace, Warhammer charging handle, RA-524 Blitz performance trigger, and an Armanov Equalizer muzzle brake. 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.