Browning Machine Gun 50 HB M2 and MK 19 40mm Grenade Machine Gun Author:Department of Defense A great value! Two military manuals combine into one book. If you purchase both books separate you will pay more for the books plus shipping cost. .50 cal. provides technical information, training techniques, and guidance on the caliber .50 HB machine gun, M2. This manual discusses how to train the unit to use the MK 19, 40-mm grenade mac... more »hine gun, model (MOD) 3, referred to in this manual as the MK 19. This manual highlights mechanical training, weapon capabilities, and gunnery principles, methods, techniques, and standards that apply to the MOD 3. It also includes preliminary gunnery, a gunnery skills test, gunnery tables, and qualification tables.« less