The 685th Armament Systems Squadron is a unit of the United States Air Force (USAF) under the Air Combat Command (ACC). Its primary role is to maintain, repair, and modify the armaments for various aircraft within the USAF inventory. This includes weapons such as guided and unguided bombs, rockets, missiles, and gun systems. The squadron also supports operational readiness by providing weapons-related technical advice to other USAF units. The 685th AAS is stationed at Eglin Air Force Base in Florida.