You can find 8 forms of ammunition issued to be used in the M2 Browning .fifty caliber machine gun, with the guidelines of the varied rounds color-coded to point their variety; these consist of: Additionally, the weight and quite large recoil of the M2 need a sturdy and stiff mount https://machguns.com/product/lot-1442-hr-model-50-reising-class-iii-nfa-cr-fully-transferable/