UNSC Weaponry

The UNSC have a wide variety of weapons in their arsenal which all have their own strengths, weaknesses and unique capabilities. They are effective on easy and normal to gun down all covenant. The automatic fire of some of them can take down an Elite extremely quickly on both Halo: Combat Evolved and Halo 2. They are also far more effective than most Covenant weapons against the Flood, with some exceptions.
 * See also: Development of UNSC Weapons

Halo: Combat Evolved
Below is a list and small description of all the UNSC weapons that can be used in Halo: Combat Evolved. To find out more about them, click on the weapon.


 * M6D HE Magnum Sidearm- A small handgun with surprising effectiveness. Its X2 scope allows for easy headshots, and it serves well against Hunters. Performs well against Flood Combat Forms and Carrier Forms, often requiring only 3-5 rounds and ~2 rounds, respectively, to kill.


 * MA5B ICWS Assault Rifle- The most commonly-used human weapon in the game. It can take down an Elite fairly easily on lower difficulty levels, but may require more than one clip on Heroic and Legendary. Second-most effective weapon in close combat with the Flood.


 * M90 Shotgun- Can kill an Elite in one shot on Easy and Normal, and it's very effective against them on Heroic and Legendary. Can wipe out a pack of Grunts with 1-3 shots. The most effective close range weapon against the Flood.


 * SRS99C-S2 AM Sniper Rifle - Very effective from long distance. Has a X10 scope with a night-vision ability. Usually a one-hit-kill with headshots on all difficulties. Fairly poor from close range and does no damage to the Flood whatsoever.


 * M19 SSM Rocket Launcher- Extremely effective against large groups of enemies and vehicles. Has a X2 scope. Also very effective against the Flood. Useless from close range as it will kill the player as well.


 * M9 HE-DP Grenade- Better known as the Frag Grenade, effective against large groups and vehicles like the rocket launcher, but requires a shorter distance to throw. Good against the Flood, but not worth using against single enemies. Elites sometimes dodge them by jumping out of the way.


 * M7057 Defoliant Projector Flamethrower- Only usable in Halo PC multiplayer. Douses enemies in fire, dealing damage and providing cover.

Halo 2
Below is a list and small description of all of the UNSC weapons uses in Halo 2. To find out more about them, click on the weapon.


 * BR55 Battle Rifle- A new version of the Assault Rifle. This fires short three-bullet bursts and has a X2 scope. Effective with headshots. Fairly effective against the Flood.


 * M9 HE-DP Grenade- Smaller blast radius than in Halo: Combat Evolved. (See Above)


 * M6C Magnum Sidearm- A stripped down version of the Pistol used in Halo: Combat Evolved. Not as effective without a scope but still good with headshots. Fairly ineffective against the Flood without getting dangerously close.


 * M90 Shotgun- Less shot in one blast than Halo: Combat Evolved. Although it has the same M90 designation, it has slight differences from the shotgun from Halo: Combat Evolved. These include a change in the color of the weapon's sights, a slightly darker coloration, and a much shorter effective range.


 * SRS99C-S2 AMB Sniper Rifle- Rounds are slightly less powerful than Halo: Combat Evolved; also lacks the night vision zoom ability. (See Above)


 * M7 SMG- Very high rate of fire and good when dual wielding. It has a high recoil, meaning the wielder must actively hold it down for increased accuracy. Average against the Flood on its own, better when duel-wielding.


 * M41 SSR MAV/AW Rocket Launcher- Fairly similar to the Rocket Launcher in Halo: Combat Evolved. It performs in a similar fashion; its only major change is the ability to lock on to vehicles.

Halo 3
These are the new weapons introduced in Halo 3. As they are still being modified, their exact performance is as yet unknown.
 * SRS99D-S2 AM Sniper Rifle
 * M6G Magnum Sidearm
 * Spartan Laser
 * Missile Pod
 * MA5C ICWS Assault Rifle
 * BR55HB SR Battle Rifle
 * AIE-486H Heavy Machine Gun