Give me the ser# (xx for last 2 digits is ok) and I'll nail it down.
Yea you stole it or the guy in the gun shop was fool
The 3 grips configurations are:
Difference being Location of the grip screws and frame screw holes.
The MKI have the mag button opposite side of the MK II but the can be switched so a MKI will work in a MKII