This Sons of Liberty Gun Works M4 includes one 30-round magazine, telescoping support brace, 3-prong muzzle brake, and is equipped with a Sig Romeo5 green dot optic. *** Magazine has been painted red. *** 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.