Halo Nation


9,806pages on
this wiki
Add New Page
Talk0 Share

.390-caliber ammunition is an ammo size used by the UNSC MA2B Assault Rifles. It is a significantly larger round than the M118 7.62x51mm round used in the MA5B (7.62x51mm = 0.308 caliber). The .390 comes in at least two varieties: the standard armor piercing rounds and shredder rounds made from depleted uranium.


  • This round size may have been specifically created for the MA2B Assault rifles - its modern counterpart is an obscure Soviet Assault rifle round.
  • Most human weapons in the Halo series use current ammunition sizes, this round is among the several that don't.
  • Spartan-II Blue Team used this round size in their MA2Bs when they apprehended Colonel Robert Watts.


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.

Also on Fandom

Random Wiki