You will need a Remington M1903a3 barrel ( to replace the M1903 Remington barrel ), a Remington M1903a3 stock, a M1903a3 hand guard, a M1903a3 butt plate, a set of M1903a3 bands, a set of parts for the M1903a3 rear sight, and ( if you can't do it yourself ), about $150.00 to get the barrels changed out. I think all that will add up to about $500.00. So, if you are into the rifle for about $150.00, it would be a viable project.