USPSA Multigun Championship
The USPSA Multigun Championship, formerly called the 3-Gun Nationals, are yearly multigun championships held by the United States Practical Shooting Association (USPSA). The Multigun Championship is always held at a separate range and date from the pistol nationals USPSA Handgun Championship and IPSC US Handgun Championship.
Source: Wikipedia — USPSA Multigun Championship (CC BY-SA 4.0)