Colt type guns are notorious for needing their grips fitted, as there is much variation between guns, makes and eras. USFA's machining was so good, these one-piece walnuts were take-offs from a gun that received carved ivory and fit nearly perfectly. Then I got a Rodeo II in .38Spl. Then my flagship .44Spl, since fitted with Nutmeg ivory. Paid $1200 for it as USFA was liquidating their sixgun assets. Wish now I'd bought more.