Is he a CCW holder? If they charge him with a misdo, i wouldn't be too worried. He should probably be more afraid of this one, a gross misdo (possible 12 mos CCDC, or formal probation):
NRS 202.290 Aiming firearm at human being; discharging weapon where person might be endangered; penalty. Unless a greater penalty is provided in NRS 202.287, a person who willfully:
1. Aims any gun, pistol, revolver or other firearm, whether loaded or not, at or toward any human being; or
2. Discharges any firearm, air gun or other weapon, or throws any deadly missile in a public place or in any place where any person might be endangered thereby, although an injury does not result,
Ê is guilty of a gross misdemeanor.
Anyhow, i've seen a few of these cases. Usually dealt to a misdemeanor, fine, anger mgt., with weapon forfeiture. IF he wants to roll the dice and go to trial on this thing, he'd better have some witnesses to establish that he had a REASONABLE fear for his safety.