If you look back at some of the old MK threads, the grip thing was gone over extensively. The older MK's just don't have enough metal to work with. I own an LTD serial# and tried many MK grips when one of our members was developing his own. The older model MK's are very difficult to make grips for, because there is not enough metal to work with. You will either have screw fitment issues, where after Dremeling/sanding, the grip will be too thin. Or the screw holes will be just a smidge off in alignment/distance. I don't know why Kahr was making these design/grip changes at the time. Serial#'s GA, GC, LTD, all different. Like the Boss said, you have to do too much removal of metal, and it becomes very thin in that area. Either the metal becomes too thin, or the grip becomes too thin. You would think that it would be easy to solve, but as many have found out, it's not.