Oddball Infobox-1-.png
Terminal.png This article, M247B2 General Purpose Machine Gun, was written by Ajax 013. Please do not edit this fiction without the writer's permission.
"The moment this thing begins to chatter, you know a November Mike Foxtrot is filling his pants with robo-turds"
―Anonymous gunner
Production information

General Purpose Machine Gun

Technical specifications
  • Barrel
    • 731 mm
  • Weight
    • 6.1 kilograms
  • Length
    • 1200 mm
Magazine Size

150 rounds

Fire Mode
  • Automatic
  • Burst
Ammunition Type



electric pulse

Rate of Fire

9000 rounds per minute


790 metres (1100 with scope)


1530 metres


Necros War




The M389B GPMG, known as the 'gimpy' among troops, is the UNSC's standard universal machine gun, suited to both use with a tripod and bipod. The weapon is made from super light polymer matter, greatly reducing its otherwise considerable weight, allowing a number of systems to be added. It sports a ultramodern on-board stabiliser, allowing sustained firing from the hip, or any other position, without a large loss of accuracy and a heat reduction system, super cooling the barrel.


The M389B GPMG is a universal machine gun, allowing it to be used for both offensive and defensive situations. Offensively, it provides the perfect squad support weapon, able to lay a withering hail of fire upon defenders. For defensive purposes, the bipod and or tripod fittings greatly increase its usability. These provide a stable platform for firing, along long, sustained fire while remaining near 90% accuracy. The Tripod is adjustable, allowing it to be set to at chest height or to a prone position.


The weapon operates using pulse system where the trigger sends an electric pulse to the electric motor that responds by loading a bullet into the chamber. The breech is locked by the motor and the next round is loaded. The electric pulse passes from here to the stabiliser which delivers feedback, stabilising the gun. The weapon has a Misriah Rail on the receiver and on the top, right, left and bottom of the forward grip. The weapon is magazine fed from a drum load, but can accept magazine inserts from Battle Rifles. Each part of the weapon has interlocking bolts that when fired, travel down the receiver rather than backwards to absorb recoil and direct it away from the shooter and it comes with fully adjustable and removable day/night iron sights.

UNSC Comments

"In training the DI gave me one, it was a lot lighter than I imagined but he ordered me to fire on the target. I thought I'd just be all over the place, I was pretty nervous but its got feed back like a sub machine gun."

"Shame this thing never gets mounted on vehicles. Then again, the thing is pretty big..."

Individual and Crew Served Weaponry of the UNSCDF


M6L Personal Defence Weapon System | M57 Pistol | M98 Compact | M19 Modular Pistol

Submachine Guns

M20A Submachine Gun | M12 Special Operations Carbine | M8Z Submachine Gun

Assault Rifles, Carbines, and Battle Rifles

MA6A Individual Combat Weapon System | M2A Carbine | M81 Special Purpose Carbine | M55C Enhanced Battle Rifle

Designated Marksman Rifles

M396 Designated Marksman Rifle | M97 Special Purpose Rifle | M113 Special Purpose Rifle

Machine Guns

M397 Individual Automatic Rifle | M739C Squad Automatic Weapon | M122 Light Machine Gun | M247B2 General Purpose Machine Gun | M247H2 Heavy Machine Gun | AIE-486K1 Heavy Machine Gun | M343A3 Heavy Machine Gun | M780 Special Purpose Machine Gun

Sniper Rifles

M22 Scout Rifle System | M818D Enhanced Modular Sniper Rifle System | M1091 Sniper Rifle System | Sniper Rifle System 99G-S6 Anti-Materiel | M99CA1 Special Application Scoped Rifle | M133 Precision Anti-Materiel Energy Weapon System


M45F Close Assault Weapon System | M108A1 Close Assault Weapon System | M77 Extreme Close Quarters Combat System

Energy Weapons

Weapon/Anti-Vehicle Model 6B Grindell/Galilean Nonlinear Rifle | MX4 Light Support Weapon | M921 ARC

Non-Lethal Weapon

M2 Threat-Negation Device | MX9 Pulsed Energy Projectile System | M39 Long Range Tranquillizer Rifle

Missile and Rocket Launchers

M41B2 Medium Anti-Vehicle/Assault Weapon | M899 Light Anti Armour Weapon | M57 Light Multipurpose Assault Weapon | M1 Multiple Launch Rocket System | M25 Underslung Rocket Launcher

Grenade Launchers

M319N Individual Grenade Launcher | M23 Multiple Grenade Launcher | M363B RPD | M460C Automatic Grenade Launcher | M556 Counter Defilade Grenade Launcher | M24 Underslung Grenade Launcher | M26 Grenade Launcher Module


M71 Mortar | M78 Mortar | M81 Mortar


M117 Light-Weight Field Howitzer

Sentry Guns

M55 GUARD DOG Sentry Gun | M601 GARGOYLE Sentry Gun


M9 Dual Purpose/High Explosive Grenade | M2 Anti-Materiel Grenade | M70 Flash Bang Grenade | M43 Smoke Grenade

Anti-Personnel and Anti-Armour Mines

M320 Anti-Tank Mine | M341 Anti-Tank Mine | M362 Anti-Tank Mine | M121 Bounding Anti-Personnel Mine | M127 Anti-Personnel Mine

Explosive Devices

C-7 Foaming Explosive | C-13 Gertex | C-14 Plastic Explosive | C-15 Liquid Explosive | M303 Thermite Cord | M311 Detonation Cord | M382 Special Munition Attack Charge (Kinetic) | M390 Breaching Charge | M394 Clearance Charge | M404 Special Lightweight Attack Munition | M366 Demolition Charge | M376 Satchel Charge | M379 Explosive Pack

Community content is available under CC-BY-SA unless otherwise noted.