Also, what rail - I don't see any kind of rail on this gun, am I missing something? I don't want or need a rail, but just wondering what above discussion is about.
The rails on the frame that the slide rides on.
The Colt Delta Elite has a cut-out in these rails above the slide stop pin where early examples had problems with frame cracking. This new RAI 10mm pistol does not; the slide rails are continous above the slide stop.