electrical and mechanical engineering regulations Structure of small arms and machine guns part Small arms training : Sub-machine guns (Austen-Owen-Thompson) Australia / War Office. Army Council. Vol. I Portobel : Dome Gunnery Trainer : Service and Instruction Manual Tank Gunnery. FM 17-12 Submachine Gun Caliber .45 inch, M3. FM 23-41 Browning Machine Gun, Caliber .30 inch, HB, M1919A4, Ground. FM 23-45 Browning Machine Gun Caliber.30 inch, HB. M1919A4. Mounted in Combat Vehicles. FM 23-50 - USA Basic Field Manual, FM 23-50 Browning Machineguns Caliber .30 inch, M1917A1, M1919A4, M1919A4E1, M1919A6, and M37. FM 23-55 Browning machine Gun, Caliber.50 inch. HB. M2. FM 23-65 37 mm. Gun Antitank M3. FM 23-70 Coast Artillery. Service of the Piece 155 mm. Gun M1. FM 4-24 Service on the Piece 90 mm AA Gun M2 Series. FM 44-27