Have a PT92 SS that always shot low. It's the only gun I've ever owned that showed to be way off when laser sighted (points about 6" low at 20 feet). Have been trying to get adjustable sights for months but only one type available and always on backorder (plus that really wouldn't fix the issu, just mask it). Finally found a PT99 slide on ebay fairly cheap that arrived today. Cleaned, mounted, sighted it and went off to the range. Wonderful!! Now shoots dead on (like all my other guns). I own Glock, Rugers, SWs, etc and this has always been my favorite gun (was my first) and I'm really glad it's problem has been resolved.