Shortening the distance the primary sear
moves up:
1. Remove ONLY this pin that is circled in red... This is the pin that
keeps your primary sear from moving so
far forward...
2. Take the pin and go to your local hardware store... Find a tube
that fits around the pin... Get a couple of different
sizes so you can work with it... You can either sand a tube to the
proper size you want if you are unable to find
one of a proper size at the store...
3. Next put the tube & pin back into the gun and u will notice the
primary sear has a small gap with the
secondary sear... Which will lead us into the next phase of this mod
process...
Shortening the distance the trigger moves
forward:
1. Find a piece of thin sheet metal... Machine it to look like a
rectangle that is fairly thin...
Acquire a drill, drill bit, tap, and screw for this step...
2. Drill a hole in front of the trigger, mine is about 3/8" to 1/2"
from the trigger, like seen below and tap it...
BE CAREFUL not to drill through and vital parts in the housing...

Shortening the distance the trigger moves
backward:
1. For the step, you will need a drill, drill bit, tap and a screw
under 1/2" long... Drill and tap the trigger
block but being careful to stay in the middle of the block and not
drilling into the hole where the
vertical white line is below...

Finished examples of this mod: