I have what looks like a very well used Colt Commander 45acp, all steel version. The slide has a bind in it, it starts where you can see the ejector pin(?) thru the notch in the slide for the slide release removal(reference point). It is real apparent when just assembling the slide to the lower w/o recoil spring/bbl/other parts. Also there are rub marks on the front of the slide(slide release side only)where the slide has rubbed on the U channel of the lower, I find that rather curious. Sometimes it will stick open when fully assembled when pulling the slide back hard with your hand as in chambering a round. A hard flick of the wrist and it goes into battery. I put about 60 rounds thru it today, other than an occasional flyer(ammo?)it shoots fairly well and in the hands of someone much better than me I feel it would perform better. My Series 70 has no such issues, seems nice and snug all the way. Any ideas/advice appreciated. Thanks Tom