I have a Ruger security six 357 with a serated trigger. Only gripes I have about the gun, is it usually draws blood from firing repetitively in double action. I understood later models had a smooth faced trigger. Got ahold of a NOS smooth trigger that's not been fitted yet. Are these parts pretty easy for an average gunsmith to fit? It's pretty easily reversible, not worried in that regard. Just not sure how peculiar these revolvers are for fitment.