This Mossberg shotgun has a 3" chamber, a fixed MOD bore, and a vented rib. *** The shotgun shows some wear to the stock and metal finish, consistent with normal handling and use. *** 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.