Perhaps the most effective and widely used heavy machine gun of the war was the M2 Browning in .50 caliber. Millions of them were produced for everything from defending bombers to being mounted on tanks and trucks and so on. The massive .50 caliber rounds could easily punch through walls and shred enemy soldiers to pieces. They also were capable of firing almost six hundred rounds a minute.
M2 Browning (3/13)
Submitted to "The Most Innovative WWII Weapons"