A professional who services armament equipment used on military aircraft. Responsibilities include:

• Strips airplanes of removable armament equipment, such as machine guns, synchronizers, and bomb-release apparatus, using handtools.
• Disassembles, cleans, oils, and repairs dismantled equipment and nonremovable armament, such as machine-gun mounts and bomb hoists.
• Inspects electric circuits controlling bomb-release and gun-firing mechanisms, following wiring diagrams.
• Immerses equipment parts not in use in hot cosmoline to protect parts from rust and stores until needed.
• Reassembles and remounts equipment.
• May be designated according to specialty as bombsight specialist.