I just bought that Diamondback and pick it up in eight days. The seller took the grips off the 33 year old gun to check the serial number then noticed the grips wobbled when he put them back on. I took them off and showed him how this little nylon washer/disc plug with center hole that goes in the grips anchor pin hole was missing. The other one was intact. He called and said he couldn't find it anywhere. I think I can make a replacement part in a matter of minutes in my garage. Or epoxy the hole and drill a new hole in the middle where the pin goes. You think these remedies make sense. I'm going by memory of what I saw on Saturday looking breifly at the problem.