This M1 Carbine features a canvas sling and a barrel marked with importer IO Inc. One 30-round magazine and seven 15-round magazines are included. Serial number: 5160816 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.