I can't say for other's
I picked up a pair of 45 cal. Uberti Cattleman for a bargain.
Nice guns though one had after market grips, some kind of hollow shelll style two piece plastic with a madalian
Black plastic & checkered , one was cracked through the escutcheon screw, making them 3 piece.
I called VTi and ordered a one piece finished grip.... the fit was as they were made for and with the frame !
The other gun had OEM Grips well fitted, aside for the slight color difference between the two they were fine.