These grips fit the Springfield Armory EMP 4" Barrel version in both 9mm and .40 S&W. These grips are cut to standard 1911 thickness of about 0.26". Factory grips on the EMP may be either slim or standard thickness depending on the model. Most of the G10 grips are standard thickness while the wood grips are generally slim. If you are changing from slim to standard thickness you should consider changing the bushings and screws for best fit with these grips.