If you intend to shoot someone, any modifications to a gun would not be cause any criminal charges. The word is intent. You intended to shoot that person and you carried out your intent and shot them. The shooting circumstances would determine whether criminal charges would be issued, not the modifications to the gun.

If you accidentally fired your modified gun, then those modifications could be cause for criminal action. Charges from careless use of a weapon, to accidential death (negligent homicide) could be charged. Of course you can count on being sued in all circumstances of injury or death..

All of my carry guns are modified for better trigger action, grip, and sighting. These modifications allow me to control and shoot the gun more accurately. I practice often with my modified carry guns, so I am familiar with the trigger, recoil, and sight recovery. Did I mention practice also helps me to hit what I'm aiming at.

Bob