Quote:
GR's, I think, typically had a solid rib, and often (maybe always?) a round knob/semi-PG


I don't have a GR2 but I do have a GR3. It has a vent rib and came with a capped PG stock, as I recall. I replaced the stock and forend with replacement Beretta factory wood from Cole, also capped PG. Same wood fits my 425, which now has a straight grip. My 425 originally had a round-knob PG, but it was too short when I acquired the gun, so it also got new factory wood from Cole.