I even checked Colts web site and 45 ACP is all it shows to be available in.
The top of the slide is a matte finish, so no problems with glare or anything. I love mine and carry it when wardrobe permits. I have about 450 rounds with only one malfunction, which I believe to have been ammo related. No problems with hollowpoints wither. I've run about 100 of those through. It is very accurate at 7 to 15 yards. I haven't tried it beyond that.