Those grips were a very popular and attractive after market style in the 1920s - 1950s era and were made for almost all handguns styles of pistols, revolvers and autos. They are a hard plastic ( Bakelite ?) material. Your gun won't shoot any better with hard rubber repo. S&W grips than with those grips! Be sure to shoot the gun with low pressure ammo., as the gun is a black powder gun. Good Luck, Ed.