I am looking for information / discussion about what people know from criminal and civil law standpoint about using a modified weapon for self defense purposes. By modification I mean replacing the original manufacturers parts with aftermarket or other manufacturers parts. I have yet to see anything in writing or specific cases but I have heard rumblings from people I work with that they would never modify their gun because it looks as if you intended it to "kill more efficiently" and basically points blame towards you instead of the criminal. But on the other side of it, a righteous kill is exactly that, you did it within the means of the law in self defense and the fact that your weapon was modified would never come into play so long as the jury sees the kill as something a reasonable person would do in that situation. Just looking to see what you guys think, know, or have heard.