If you are into firearms this is the weekend for you.  Billings original gun show is this weekend at the MetraPark Expo Center. Today from 1 to 5, Saturday 9 to 5 and Sunday 9 to 3.  Their professional dealers are the best in the region. If you're looking for something special, chances are they have it! They buy and sell collections.  Attend the Billings Gun Show this weekend at Metra Park Expo Center.   While you're at the Expo Center, run next door the the Metra Main building and take in some of the huge State High School Wrestling tournament.