Your inspiring me to get out to the range with my new Mark IV 22/45 Lite, I haven't shot it yet but already got a Hi Viz front sight, Stoner G10 Grips and took the rail off and plugged the holes with 6/48 gunsmithing screws I got at my local Ace Hardware. If mine shoots as well as yours I'll be very happy......congrats, so what did you like or not like about the 22/45?