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40px-Terminal.png This article, MX12 Directed Ion Energy Rifle, was written by Ajax 013. Please do not edit this fiction without the writer's permission.
Ion rifle
MX12 Directed Ion Energy Rifle
Production information



Directed Ion Rifle

Technical specifications


Damage Per Hit


Magazine Size

Three pulses

Ammunition Type

Compressed Hydrogen gas/plasma core

Rate of Fire

1 pulse per seven seconds


variable upon line of sight, planet curvature, atmospheric conditions, 3km max


Necros War




"This is ma frien' teh death ray. You piss my death ray off, he'll blow a hole through you. Don't think hiding in your APC is gonna help, he says snuff and he'll blow open your armoured baby carriage and screw about with its 'tronics. This lil' bitch don't take no prisoners."
―Lance Corperal Malcom Evans

The MX12 Directed Ion Energy Rifle is a UNSC energy weapon. The weapon fires a particle beam of ionised atoms that creates significant kinetic damage and secondary electromagnetic after effects.


The weapon ionizes hydrogen gas by either stripping an electron off of each hydrogen atom, or by allowing each hydrogen atom to capture an extra electron. When hydrogen gains electrons it forms anions. The weapon accelerates anions uses a traveling wave type particle accelerator. In this kind of ion accelerator, the negative ions are released inside a cylindrical ion acceleration chamber. This chamber has an electrode with an alternating electric charge of up to 1,000,000,000 (109) volts inside it. While the charge on the electrode is positive, the ions are attracted to the negative charge on the electrode, and thus bunched around it.

The alternating voltage switches the charge to negative on the accelerating electrode. The negative charge electrostatically repels the negative ions and accelerates them to near the velocity of light. The resulting high energy beam of anions passes through a chamber filled with low pressure gas. There, collisions withthe gas strip the extra electrons from the anions, and thus make the particle beam neutral. The particle beam proceeds straight to its target, and damages it by running into it, and by disrupting the structure of the target with its kinetic energy. The weapon has the background effect of Electromagnetic Radiation.


The weapon is used primarily as a experimental anti vehicle weapon. While actually incapable of severely damaging heavily armoued vehicle, against lighter vehicles it is extremely effective. Due to its hitscan nature it can only miss through human error and can punch holes in the thin armour of enemy light vehicles, destroying internal systems. The background EM effect further renders these vehicles useless as the initial beam will have punched a hole through any EM protection systems.

This weapon isn't issued to regular forces, instead being issued to special forces weapon specialists, being used to defeat and disable enemy armour, making it especially useful for pursuit and capture. It also serves well as a long range anti-materiel weapon and as a anti-power armour weapon, being useful for disabling the shielding of heavy infantry and disabling power armour.

UNSC Comments

Individual and Crew Served Weaponry of the UNSCDF

Assault Rifles

MA6A Individual Combat Weapon System | M2A Carbine

Battle Rifle

M55C Enhanced Battle Rifle | M396 Designated Marksman Rifle

Machine Guns

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

Submachine Guns

M20A Submachine Gun | M12 Special Operations Carbine


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

Sniper Rifles

M113 Scout Rifle System | M1091 Sniper Rifle System | Sniper Rifle System 99G-S6 Anti-Materiel | Sniper Rifle System 99S-S6 Signature-Suppressed Anti-Materiel | Sniper Rifle System 40A-O Anti-Materiel/Anti-Vehicle | M99CA1 Special Application Scoped Rifle


M6L Personal Defence Weapon System | M57 Pistol

Energy Weapons

Weapon/Anti-Vehicle Model 6B Grindell/Galilean Nonlinear Rifle | MX4 Light Support Weapon | MX12 Directed Ion Energy Rifle | 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 | M556 Counter Defilade Grenade Launcher | M460C Automatic Grenade Launcher | M24 Underslung Grenade Launcher | M556 Counter Defilade 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

Angel Arm Specialties

Angel Arm Special 33 | Angel Arm Cutlass