You can find eight different types of ammunition issued for use in the M2 Browning .50 caliber machine gun, with the guidelines of the assorted rounds shade-coded to indicate their form; these incorporate: In 1917, the United States entered Earth War I. With the two the Allies and Central Powers https://machguns.com/product/lot-1442-hr-model-50-reising-class-iii-nfa-cr-fully-transferable/