The MA37 Individual Combat Weapon System (MA37 ICWS or MA37 Assault rifle), formally known as the Individual Combat Weapon System, Caliber 7.62 mm MA37 and the MA5 by the UNSC Marines and Navy, is a standard issue service rifle of the UNSC.
The MA37 was first introduced in 2437 and has remained the primary service rifle of all branches of the UNSC ever since. It is an air-cooled, gas-operated, magazine-fed, fully-automatic bullpup rifle that fires from 32-round magazines of 7.62x51mm ammunition. It possesses a built-in ammunition indicator and magnetic compass for orientation, similar to that of all other MA5 series rifles. It has a high rate of fire, but due to its inaccuracy, it is highly ineffective at long ranges and inflicts low damage against energy shields.
- The MA37 lacks long-range capabilities, so it pairs well with weapons like the DMR.
- At close range, fully-automatic fire is recommended. At longer ranges, fire in bursts to conserve ammunition and improve accuracy.
Changes from MA5C ICWS in Halo 3
- The bullet counter on the HUD decreases column by column rather than row by row like in all previous games.
- Shorter overall length.
- Changes that affect most UNSC weapons in Halo: Reach, such as hitscan and reticule bloom.
- Slightly slower rate of fire (by about 100 rounds per minute).
- Larger reticle, but bullets will always hit inside the crosshairs that are inside the reticule, making it just as accurate as the MA5C.
- Max ammunition is decreased from 352 to 288.
- Short, controlled bursts are more effective at range than fully-automatic fire.
- Slightly less damage (19 rounds to kill a fully-shielded SPARTAN player, rather than 16 rounds).
- If the player participated in the Halo: Reach beta, a unique MA37 nameplate emblem is obtainable for use in multiplayer.
- The maximum reserve ammunition for the MA37 varies for certain campaign missions and exceeds the limit of 288 (e.g. 600 max in the level Winter Contingency).
- Although the MA37 is the predecessor of the MA5B, on the right side of the rifle, just above the trigger mechanism, it reads "MA5C Mk. 4."
- The shell casings of the MA37 have the word Chief written on them.
- The MA37 is, by far, the weakest in-game Assault rifle. The MA5B kills a SPARTAN in 15 rounds, the MA5C kills with 16 rounds, but the MA37 kills with 19 rounds total.
- The east and west orientations on the ammo counter compass are reversed compared to the compass in the players HUD (east on left, west on right).
- MA5B Individual Combat Weapon System (Halo: Combat Evolved and Halo Wars)
- MA5C Individual Combat Weapon System (Halo 3 and Halo 3: ODST)
- MA5K Carbine (Halo: Ghosts of Onyx)
- MA5D Individual Combat Weapon System (Halo 4)