This is one of the 500 20 gauge guns sent to Kreighoff and fitted with 16 gauge barrels. As you can see this is not aftermarket. The gun is used and the stock is repaired at the wrist (the brownells repair stud shows. The are scratches in the stock finish and the case color is pretty much gone. The 16 gauge barrels Have Brierly chokes fitted. The 20 barrels are imp and mod 26 in and the 16s are 28 inch. The left ejector does not stay cocked after the gun is fired although it cocks and works fine. This means that when you take the forearm off after firing you have to manually cock it with a shaped dowel that is included. In addition to the cracked wrist the bottom of the forearm has a minor repaired cracked at the bottom that is not very noticeable. I have had this gun for 2 1/2 year and have shot many birds with it and it is mechanically excellent except for the ejector not cocking as mentioned. Comes with the original case and canvas cover, snap caps and key. Also has 5 coke tubes for the 16gauge.