training regulations Cavalry : the cavalry machine-gun platoon / prep. under direction of the Chief of Cavalry - United States War Department Training Regulations TR 425-70 machinist - USA Voorschrift, Technical Manual, 10-445 Browning machine gun, caliber .50, M2, aircraft, fixed and flexible - USA Voorschrift, Technical Manual, 9-225 Milling machines, shapers, and planers - USA Voorschrift, Technical Manual, 1-421 Grinding machines - USA Voorschrift, Technical Manual, 1-422 Browning machine gun, caliber .50, HB, M2 ground - USA Basic Field Manual, FM 23-60 Browning machine gun caliber .30, HB, M1919A4 (mounted in combat vehicles) - USA Basic Field Manual, FM 23-50 Browning machine gun, caliber .50 HB, M2 / War Department - USA Field Manual, FM 23-65 Browning machine gun, caliber .30, HB M1919A4, ground - USA Basic Field Manual, FM 23-45 Browning machine gun, caliber .30, HB, M1919A4, ground - USA Basic Field Manual, FM 23-45 Machine gun mounts for trucks/ By John Vink BSc, 6th US Armored Division (ASC).