Small-Arms Weapons Mechanic (903) Enlisted Personnel

Maintains and makes third and fourth echelon repairs on all types of hand and shoulder weapons and machine guns, including submachine guns and aircraft machine guns.
Visually inspects and manually operates weapons to check for malfunctioning of such elements as bolt action, trigger tension, rifling in gun barrel, firing mechanisms, ejectors, ammunition feed mechanisms, and extractors. Disassembles and repairs and replaces worn and defective parts of such weapons as pistols, revolvers, rifles, carbines, riot guns, submachine guns, and 30- and 50-caliber machine guns. Reassembles weapon, lubricating, machining, grinding, and making precision adjustments of all parts to secure required clearance and tolerances.
Tests repaired weapons by simulated or actual firing of weapon. Must be able to fabricate simple replacement parts with the hand tool issued.
Uses such tools and equipment as combination and spanner wrenches, pliers, screw drivers, hammers, punches, drift pins, reamers, drills, engine lathe, drill press, power grinders, and precision gauges and micrometers.
For Army Air Forces, must be qualified in third or fourth echelon maintenance and repair of 20-mm, 37-mm, and 75-mm aircraft cannon.
Must be thoroughly familiar with construction and operating features of all types of small-arms weapons including nomenclature of replacement parts.

Alternate nomenclatures:

  • Machine Gun Mechanic
  • Weapons Mechanic, Aircraft
  • Weapons Mechanic, Hand and Shoulder
  • Weapons Repairman, Small-Arms

Suitable Substitutions