Outdoor Holding Company operates an online marketplace business. It owns and runs the GunBroker e-commerce marketplace, an auction site supporting the lawful sale of firearms, ammunition, and hunting and shooting accessories. The company also offers a state- and federal-compliant solution connecting buyers with sellers. Formerly known as AMMO, Inc., it changed its name to Outdoor Holding Company in April 2025 and is headquartered in Atlanta, Georgia.