Serious legal question....I've never heard of this before.....my friend last night was talking about how you have to be careful what kind of engraved items you put on your gun in case you ever need it for self defense.....for example, he said that if you use your AR in a self defense situation and your dust cover has the words "You're ****ed" or "Smile, wait for the flash" ... something like that....a good prosecutor could use that to show intent and motive and charge you with murder. He said there was a case a while back where a police officer had to use his rifle to stop a threat and was charged with murder and convicted because the inscription on his rifle was successfully argued to show premeditated intent to kill. Any truth to this? It sounds absurd.
A "good prosecutor" could get a guilty verdict on an innocent man every time they try.