There is nothing in the law of any state about
I generally agree.
There was a case here a few years ago where the shooter was found justified in killing his neighbor in a gunfight. He got 15 years in prison for endangering 3 people standing nearby during the shooting. Imagine if he had actually hit one of them.
If you shoot the guy you are clearly justified in shooting, that's probably all it comes down to, although people constantly get sued over justified shootings. But when things like modified guns are really important is when it's not clearly justified, like when you shoot the wrong person or when your justification is based on a mistaken belief that you are in danger.
I once testified as a firearms expert in a robbery case, where the robber had shot a cashier in a convenience store. He said he didn't mean to, but she grabbed his gun and pulled. The evidence was that when the police recovered the gun at the scene there was fired brass in the chamber, so very likely the guy was telling the truth. The weight of the trigger was one of the first things the experts on both sides were asked. I actually measured it, while the expert on the prosecution side just said "five and half to eight pounds." That wasn't true and didn't make sense until I realized later he hadn't tested it and had just quoted the Glock manual or web sight that said "5.5 - 8 lb." which actually meant 5.5 OR 8, for standard or New York trigger, not a range of 5.5 to 8.
A couple of years ago I was involved in a shooting case where the punisher logo was an issue. It was on the officer's car, not his gun, but it was visible in video of the shooting, so that made a really bad impression and was played up by the attorney for the dead guy's estate.