Browning .50-caliber Machine GunsThe Browning . 50 caliber Machine Guns has become the longest serving weapon in the US inventory. The "fifty" has been employed in every imaginable role for a machine gun. It is considered such an effective and reliable weapon that few countries ever attempted to develop an equivalent. Even the Japanese created a copy of it during World War II when the US was producing literally thousands every month to use in every theatre. This is a history of the