1) Remove slide stop
2) Depress spring plug and turn barrel bushing to release spring plug
2) Remove spring, spring plug and bushing
4) Pull slide rearward and lift rear of the slide up and off frame
5) Remove factory guide rod
6) Slide included recoil buffer over the end of the full length guide rod.
7) Insert full length guide rod into place
8) Install slide in reverse order
9) Insert slide stop (the end of the guide rod might be in the way, just tilt the pistol barrel down some to slide it out of the way
10 Insert bushing and compress recoil spring and insert spring plug and return barrel bushing to original orientation.