This Rock Island Armory M5 shotgun has a 3" chamber, fixed CYL bore, shell holder on the buttstock, jeweled bolt, and a heat shield. 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.