The standard-issue duty weapon for Deputy U.S. Marshals as of 2026 is the Glock 17 Gen5 chambered in 9mm. This represents a shift from their previous long-standing duty weapon, the Glock 22 in .40 S&W, following a broader law enforcement trend toward the 9mm platform for its higher capacity and improved terminal ballistics with modern ammunition. In addition to their primary sidearm, Deputy Marshals often carry a "backup" or "off-duty" weapon, which is typically a smaller subcompact Glock model like the Glock 26 or 43. For high-risk operations, such as fugitive apprehensions or witness protection details, they have access to specialized equipment including the AR-15 platform (often the Colt or Daniel Defense variants), Remington 870 shotguns, and various less-lethal options like Tasers and OC spray. As the nation's oldest federal law enforcement agency, the U.S. Marshals Service maintains rigorous firearms training and qualification standards to ensure their deputies are prepared for the wide variety of tactical environments they encounter daily.