.50 Cal is a type of ammunition featured in The Last Stand: Union City. It is used exclusively by the M82 Sniper. It deals extremely high amounts of damage and knockback, but is extremely rare. The M82 Sniper does not need to be unlocked to obtain .50 Cal ammo. It can generally be found from zombie drops at the Military Base in Waterside. Alternatively, wait for a horde attack at Union Island, then farm out the drops. M82 Sniper
M82, Final Stand 2 Wiki
Call of Duty: Vanguard - Wikipedia
M82 Sniper (TLS:UC), The Last Stand Wiki
Raufoss Mk 211 - Wikipedia
SPARTAN-II program - Halopedia, the Halo wiki
12.7×108mm - Wikipedia
M1919 Browning machine gun - Wikipedia
M82 Sniper (TLS:UC), The Last Stand Wiki
M82, Final Stand 2 Wiki
Ammunition, The Last Stand Wiki
static.wikia.nocookie.net/callofduty/images/d/dd/M
Battle of the Little Bighorn - Wikipedia
45-70 - Wikipedia