USMC Warrant Officer 1 Rank Miniature is the official United States Marine Corps rank for an WO1 officer. Warrant Officer 1, abbreviated WO1, is the first and lowest Warrant Officer rank. To become a Warrant Officer 1 the enlisted member must submit a written application and must be proficient at leading and their technical specialty. Has a gold finish that wraps around the red blocks on the rank. This is a miniature size rank that can be immediately placed on an official United States Marine Corps uniform. Sold in pairs and is made in the USA.