I have seen some of this come up in civil court as far as criminal court I haven't seen it. But this was back in the 80s and early 90s. When I was going thru civil court action my actions were question alot and training that I had done and gone thru were brought up. As far as gun mods the only thing that was brought up was "did I cock the hammer before I pulled the trigger" & " what was the trigger pull weight on my gun" The others lawyer was trying to use the hair trigger issue but my lawyer was slick when he had the jury actully fell and pull the trigger.The jury made several comments that it was had to pull the trigger on my gun. My pull weights were 12LB double action and 4LBs single action on a Model 57 4" 41 Mag. Long story short I won in that case and the judge dismissed the case. Just a note the other party had sued me the weapon mfg,ammo mfg and holster mfg and the department I worked for and the state and also the training schools I had been to include the military training I had. In todays world alot of people and lawyers think a civil siut is their way for early retirement.Erich said:I am an attorney. I've been a prosecutor and am now an appellate criminal defense lawyer. I've never worked seriously in the civil arena.
Sure, anything can turn out to be a liability in court. A lot of juries have idiots on them, and a lot of civil lawyers are jerks who will bring suit on behalf of wrong-minded people without really thinking things through. No one can tell anyone how things will turn out in court.
I have had trigger work done on some of my guns, though, and my explanation would be, "This work was done in order to make my gun safer by making it more fit for accurate shooting, so that I wouldn't hit anything that I wasn't intending to hit. I had this trigger work done so that I could be more safe - I think all gun owners should be similarly responsible in ensuring their weapons function with precision."
Anyway, I've been doing this for over a dozen years (and I've worked on dozens and dozens of shooting cases, certainly over 100 - although not all of these were fatals), and I've never seen it come up in the criminal arena.
As far as mods on my guns go today is very simple sights, trigger(smooth and not lightened) dehorning thats it and I use ammo that is used on local police departments.Most use S&W 40 but I use 9mm but same brand and bullet style.