Lever is cut and rewelded back to a specific angle.
Lifter modified by tig welding extra material in the area where the lever contacts the lifter.
Links are OEM but in some cases the link channels have to be modified such as lengthening the channels on both links.
Springs such as lifter, lever and mainsprings are modified and lightened.
Retime rifle after all the modification are performed.
To note: tolerances on these rifles varies, so cut/weld short stroke depends on certain rifle's tolerance and functions. It's best to have a gunsmith that do this type to work on your rifle. IMO.