The old MK9 is back together and the trigger feels much smother with a snappier return ... probably took about two hours from start to finish but I polished everything I could while apart .... I put in new cocking cams and spring .... then new spring and plastic trigger bar retainer along with new trigger bar spring .... the plastic trigger bar retainer was broken into and causing a lot of drag on the trigger .... I did have to punch the trigger pin out ... The gun had a few failures to eject also, it would pull them out but wouldn't throw them clear of the slide ... so I put in a new extractor and spring ... the old spring was shorter than the new one by an 1/8 to 3/16 of and inch (just guessing .. didn't measure) the gun will still feed even riding the slide closed and ejected a couple of clips with no problems ... I'll test fire the gun this weekend and make sure she's preforming up to Kahrs standards .... I want to think everyone for the help it is much appreciated and saved me a lot of trouble .... a thumbs up to Kahr for getting me the parts in just 3 or 4 days .... Again Thanks for your time and trouble.