Halo Nation

M990 Electrothermal-Chemical Smoothbore Cannon

10,043pages on
this wiki
Add New Page
Talk0 Share

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]



Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.