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MA37/MA5B Individual Combat Weapon System


Spartan II's
Spartan III's


Brute Chopper
Sniper Drop Pod
silver combat unit
VS Red weapon pack
Silver weapon pack
Artic combat unit
Covert Ops Drop Pod
Desert Combat Unit
UNSC Rhino
Halo Battlescape III
EVA's Last Stand

The assault rifle is the standard weapon of UNSC forces. They mostly appear with Marines.



The MA37, known as the MA5A by the Navy and Marine Corps, is a fully automatic, gas-operated 7.62x51mm bullpup assault rifle, with a 32 round magazine. It appears in Halo: Reach, and on the cover of the 2010 re-release of Halo: The Fall of Reach.

The MA37 appears in the Fall 2011 sets.


The MA5B ICWS, which appeared in Halo: Combat Evolved and Halo Wars, is an update of the MA37, which replaced its predecessor in the Navy and Marine Corps. Like the MA37, it is a fully automatic, gas-operated 7.62x51mm bullpup assault rifle. The magazine size has been increased to 60 rounds, the internal components are fully modular, and weapon is designed to be entirely disassembled and reassembled, allowing it to be reconfigured and internally integrated with attachments like grenade launchers, flamethrowers, and under-slung shotguns (the weapon is issued with an integrated flashlight). The MA5B is the preferred weapon of the SPARTAN-IIs, having trained with it more extensively than any other weapon. However, the MA5B was much more prone to jamming than the older MA37, since the larger amount of cartridges in the magazine could stress the springs, which would result in cartridges being unable to enter the firing chamber.

The MA5B was the original assault rifle released by Mega Bloks, and has several different variants.

Version 1


Version 2



  • "For every time I've felt outgunned by those alien @#!*% shooting blobs of energy at me I have felt like Death himself watching their bodies come apart under a hail of lead from my MA5." -Anonymous UNSC Marine
  • "The MA5 is built like a brick outhouse with Venetian blinds. You can pound on a mother****** with it like it was a sledgehammer." -Anonymous UNSC Marine
  • "Hey, soldier, is that an assault rifle in your hands or are you just happy to see me?" -Janissary James
  • "The MA5 is the workhorse for us ground-pounders. Just holding it makes you feel like God's own anti-son-of-a-b**ch machine." - Anonymous UNSC Marine
  • "When I die please bury me deep! Place an MA5 down by my feet! Don't cry for me, don't shed no tear! Just pack my box with PT gear! 'cuz one early morning 'bout zero-five! The ground will rumble, there'll be lightning in the sky! Don't you worry, don't come undone! It's just my ghost on a PT run!" UNSC Marching Song


  • Although there are 4 in game variants of the MA5 Assault Rifle variants B, C and D all look the same on the outside.

In Game Use

MA5B ingame.png
A SPARTAN-II wielding an MA5B
in Halo: Combat Evolved's multiplayer.

Me 1.jpg
Anonymous ONI agent's SPARTAN wielding an MA37 in Halo: Reach's Firefight mode.