Can this guy be brought up on charges like criminal threatening, assault, etc?
It would seem that the result of any sort of criminal charge would result in the loss of his firearms. Even a restraining order from the guys who were threatened would aid in the physical defense of yourself and your family, as well as forcing some extra interest from the law.
It’s tough to know what the best course is. My instinct is that this guy is a coward who has never been brought to heel, which only emboldens that type of personality. Perhaps it is time that he was taught an unexpectedly forceful lesson.
Well, loss of his legally obtained firearms, anyway. Legal action by the this guy's declared target is useful only if he is jailed immediately after the complaint is made and there is ironclad surety that he will go to prison for many years without any bail time.