When you look at the gun from the front is there a slot/hole in the rail? I can see that the right feed body is milled for the pump kit and I think the rail may be as well. While I don't have a need for one, it may help you sell it. Pump milled bodies are fairly common and while not uber rare factory milled rails don't pop up for sale all that often.
why is it that 90% of the people with "contract killer" grips look like they could be b*tch slapped by a girl scout?