You skipped my "real world" point. There have been lawsuits against firearms manufacture's when someone dropped a gun and it went off and shot a bystander. I am trying to remember back aways but a woman was standing in line at the grocery store and when she pulled out her wallet it snagged either a Jennings or Sterling pistol that dropped to the floor and shot another person. Now if the Jennings or Sterling would have been a "safely" designed pistol but she had modified the trigger pull the result would not have been a big lawsuit against the manufacture for an improperly designed pistol but against the woman for altering the firearm. In this case the lawsuit was against the manufacturer and rightly so.
The same scenario applies to altering any handgun from its original factory pull. The newer Colt and Smith trigger redesigns were done for a good reason and altering them opens you up for a big lawsuit if the weapon is dropped or even jarred and it goes off.
In my life I have seen more than one weapon, rifles included, go off because of altered triggers and even factory triggers adjusted to light. It is not uncommon at all.
Point well taken. When I was a young cop, back before they invented electricity, I carried a Jennings 22 as a back up, and I have had that one go off simply when chambering a round. I had a Colt 25 go off when dropped, pretty scary.
An that is why I support drop tests, they are not perfect, but they would weed out the little Jennings and similar. I still used the Jennings, it became my canoe gun, I just did not carry a round int the camber. Mine was very accurate, and better than nothing.
As to changing springs and legal liability. 100% of the time when you modify a gun, like lowering the spring weight, you give a plaintiff's attorney an opening. If the gun fires an the claim is you did not intend to fire you are toast. Because you intentionally and willfully modified the gun from the design specs. Making it more likely to go off early.
If it is a criminal case you can refuse to testify, if it is a civil case where you are sued you cannot refuse to testify and you cannot survive cross examination on those cases.
If you say the gun was too hard for you to accurately pull the trigger because the factory pull was too heavy, you just told the jury that you do not have the hand strength to shoot a handgun like a normal person. So, you paid money and bought lighter springs so it would fire more easily, correct?
Mas Ayoob has written on this about going from the factory Glock 5.5 pound trigger to a 3.5 pound trigger, a dumb idea he says legally. I just agree, although I did that trigger reduction on some of mine. Just because some of us are lawyers, does not make us,,,,smart, we all want lighter pulls.
To be clear, if the gun is a competition gun and not carry gun, that is not an issue, until you shoot someone. I have fired Glocks with 1 pound and 1.5 pound triggers, I love them, but not for a carry gun, we all know that. Smooth a trigger all you want, but if you lower the pull weight an shoot someone, you lose the ability to claim the gun went off, you did that. As I indicated in post 25 above.
So, don't drop guns, and don't modify guns, and maybe our risk will be lower? Yea, I think so.