Sent the slide, mount, and optic to HCG. Got it back and the results are great. All parts look good together. Ben had to enlarge the dovetail on the slide a bit to accomodate the mount, but it works. Vortex sits a little higher than the old sights, so no co-witness, but that was expected. Gun cycles my regular loads fine with a little softer recoil. Dead on accuracy. Much tighter groups in IDPA style shoots. Dot is a little hard to pick up from the draw, but I’ll get used to it. No spring change was required. Fits my Webber holster, but not my old Safariland. Not really an edc gun anymore, but for steel and paper, it is super. Overall result is great and I would do it again.