In my younger days I often heard of a cowboy as having a "pearl handled six shooter." And many writers even described the grip of a Colt Single Action as having a "plow handle grip." And gunfighters who "notched the handles of their six shooters."
Later, from a veterans hospital in Memphis I heard of many men in therapy making plastic "grips" for revolvers.
I believe it was the late Steve Herrett who insisted they proper term was "stocks." Cloyce and Roper made handgun grips, Herrett's made handgun stocks.
In fact, I believe that as a boy, I was impressed by a cowboy who had a "red-handled six shooter."
Me? I'll just go with the flow on that one.