Been a while since I last visited here, but yesterday I ran across what I thought was a good deal in a used 935 camo waterfowl shotgun with a BlackCloud extended duck choke added. I believe it was made in 2016 according to the serial number. I found the bolt was sticking somewhat, so I disassembled and cleaned the forward portion of the gun. I took some fine steel wool to a rough portion of the right side of the bolt slide groove that smoothed it out. The bolt slams closed now as it should. I made the mistake of taking the forward screw retainer out from the gas port and discovered there is a very stiff large coil spring that shoots the screw out past the threads. However it appears that it was never cleaned or removed before and the screw was stuck pretty good before I ever got it to turn out, but it did. However, I could not mash the screw down by hand to put it back together. I had to use a C-clamp (w/rubber pads) to hold the screw down to press in the spring so I could tighten it into the threads with the end of a pair of scissors. It worked and I got it back together. I would still like to punch out the trigger assembly and clean the spring in the stock to make sure they are clean and lubed. I also would like to install the drop shim kit and maybe remove about a ¼” from the rear of the stock behind the butt pad if possible to reduce the LOP. I hope this shoots and cycles OK as I am a fan of Mossberg shotguns in general.