M990 Electrothermal-Chemical Smoothbore Cannon

The M990 Electrothermal-Chemical Smoothbore Cannon is a United Nations Space Command armament that is mounted on the M820 Main Battle Tank. Introduced into service in 2557, the M990 ETCSB cannon fires guided 150mm rounds with energized propellants.^[1]

Appearances[]

Halo 5: Guardians (First appearance)

Sources[]

↑ Halo Waypoint - Universe: Scorpion

v d e UNSC Vehicle-mounted Weapons and Explosives

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