Hi Friends, new member but long time lurker. Inherited used 10-6, 4 inch skinny barrel, some nicks and scrathes decent blue. As received, loaded with 6 unfied rounds. Can not swing out cylinder, can't cock hammer, can't depress trigger (with caution), can't cylinder release. Have owned stock M&P's, this prob different than others which were backed out ejector rods. I disassembled carefully, starting with hammer spring then disassembled. Have frame with all parts out except cylinder assembly, ejector rod and front latch under barrel. Tried to push cylinder release using orignal parts, then used puch to push, its frozen. Verified ejector rod was tight, loosened and retightened using popsickle stick method to verify it was tight. Cylinder now free spinning in frame. Frame and ejector rod appear straight. The underbarrel latch pin doesn't look centered. I wonder if its stuck? Have never punched pin out. Any suggesion appreciated.