This MAC shotgun has a 3" chamber, a removeable CYL choke, and one 5-round magazine. *** The retaining nut shows marks around its entire circumference, and no sights are currently installed. Magazine included only accepts 2 3/4" shells. *** 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.