The largest Military & Old West Collectible show West of the Mississippi offering 600+ tables of some of the finest Military and Old West collectibles to be found brought to you by The Heartland Militaria Show LLC Est 2017. This show is like stepping back in time and walking through a museum however in this show you can Buy/Trade and Sell Military and Old West collectibles. Located right in the Heartland of the United States at the Oklahoma City Fairgrounds (Pavilion Center) just 10 minutes away from Will Rogers International Airport. Our show is now an international stop for Military/Old West collectors from all over the world. Exhibitors from throughout the U.S. and the World will be buying/selling and trading Militaria, Antique Firearms, Old West Memorabilia, Native American Artifacts and so much more. The Heartland Militaria Show will be held on Jun 20th – 21st, 2026 in Oklahoma City, OK. This Oklahoma City gun show is held at Heartland Militaria Show Oklahoma State Fairgrounds and hosted by Heartland Militaria Show LLC.