Browning Machine Gun 50 HB M2 and CrewServed Machine Guns 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. Crew-served machine guns provide technical information, training techniques, an... more »d guidance on the crew-served machine guns, 5.56-mm and 7.62-mm (M249/M60/M240B). The purpose of this manual is, to provide a one-source document for all three weapons. This prohibits having several sources to rely on.« less