Cant believe this. I was going onto this site to post the exact same question. Was looking at the 10-8 website last night trying to figure out the same thing.
What I also didn't know was what the stock sites were. I don't have a caliper. Rich, did you measure them yourself or did you research the information?
I spoke to a fellow IDPA competitor with much more experience than myself and he said he liked the narrowest front with the widest rear.

__________________
MP 9 PRO, MP 9 FS, 9MM SHIELD