This is a full and open competition solicitation for 54,386 vehicular track shoes, with a base quantity of 27,193 and an option for an additional 27,193. The procurement is for a Qualified Products List (QPL) item, and the Technical Data Package is restricted to certified Data Custodians under the U.S./Canada Joint Certification Program. After the solicitation closes, the contracting officer may elect to hold a reverse auction, for which bidders must be registered and trained in a specific online system.