I have a 28" plain barrel with full choke that could be used for turkey for $ 110.00 and a Hastings 24" rifled slug barrel with cantilever scope mount for $ 175.00. I will pay the shipping in the USA via UPS ground. They are both for Ithaca Model 37 featherlight 12ga 2-3/4" pump shotguns new style after the 855xxx serial number. The full choke is very clean no rust and like new the hastings is two years old in excellent condition with one tiny rust spot near the muzzle end. I'm not familier with the DS police special guns but I think my barrel would fit. Bill