20-MM automatic gun M1 and 20-MM aircraft automatic gun AN-M2 : ordnance maintenance - USA Voorschrift, Technical Manual, 9-1227 Guns illustrated 1985 / ed. by Harold A. Murtz ; Gun Digest Browning machine gun, caliber .50, HB, M2 (mounted in combat vehicles) - USA Basic Field Manual, FM 23-65 Antiaircraft artillery : service of the piece 3-inch antiaircraft gun - USA Coast Artillery Field Manual, FM 4-125 Browning machine gun, caliber .50, M2, water cooled, and mounts - USA Voorschrift, Technical Manual, 9-226 37-MM AA gun matériel - USA Voorschrift, Technical Manual, 9-235 Service of the piece : Multiple machine gun mounts - USA Voorschrift, Field Manual, 44-57 Basic Half-Track Vehicles (IHC) (Personnel Carrier M5, Car M9A1, Multiple Gun Motor Carriage M14, and Similar IHC Vehicles) - USA Voorschrift, Technical Manual, 9-707 Service of the piece : 8-inch gun M1 and 240-mm Howitzer M1 - USA War Department Field Manual, FM 6-95 Materiel instruction memorandum : The Firing Battery 155mm Gun M1 Thompson submachine gun caliber .45, M1928A1 - USA Basic Field Manual, FM 23-40 Thompson submachine gun, cal. .45, M 1928 A 1 - USA Basic Field Manual, FM 23-40
