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M78 Mortar
Production information

M78 Mortar



Technical specifications
  • Length:1.71 meters
  • Weight: 47.6 kilograms

80-6000 meters, up to 9000 meters with specialized ammunition


Necros War




The M78 Mortar is a UNSC crew-served light artillery/infantry fire support weapon.


The M78 is a 81mm long-range gravity fired smoothbore battlefield mortar used to provide heavy tactical fire support to UNSC troops. An indirect fire weapon, it is capable of launching a variety of munition across the battlefield. Unlike previous mortars, the M78 carries six rounds in a revolver-like drum at the base of the weapon. To reload the weapon, the drum is simply slid out and reloaded with mortar bombs.

The weapon is deployed like any conventional mortar, with a base plate and an adjustable bipod. It also constains an attached targetting suite with dataport link, allowing it to be connected via cable, wirelessly or via sat uplink to a plethora of battlefield systems, such as the cameras attached to forward soldiers, recon drones, recon vehicle's optical suites foward camera emplacements and military satillites. This, along with the day/night vision telescopic targetting sight with laser range finder mounted on the mortar allow it to pick out its targets and engage them accurately.

The weapon has a incredibly sturdy design, allowing it to fire all six rounds in six seconds without noticeably deviation in accuracy. The weapon is riddled with coolant tubes and the firing end is finned, allowing it cool faster. It also has a Blast Attenuation Device to protect the crew from the blast when firing.

The vehicle is served by a crew of five, with the squad leader, the gunner, the assistant gunner, the first ammunition bearer, and the second ammunition bearer.

  1. The squad leader stands directly behind the mortar where he can command and control his squad. He also leads the squad in emplacing and firing the mortar.
  2. The gunner stands to the left of the mortar where he uses whatever means to target the enemy and moves the mortar into the correct firing position via the digital controls on the bipod. He is equipped with a dataport linked holoslate for targetting the enemy positions.
  3. The assistant gunner stands to the right of the mortar and cleans the weapon after every fifteen shoots or after each fire mission. He is the one who actually fires the weapon by releasing the mortar into the firing tube from the revolver.
  4. The first ammunition bearer stands to the right rear of the mortar. He has the duty of preparing the ammunition (charge settings, fuzes, etc...) and loads them into the revolver and passes them to the second ammunition bearer.
  5. The second ammunition bearer stands to the right rear of the mortar behind the ammunition bearer. He maintains the ammunition for firing and provides local security for the mortar position.

It is a unusually large for a tactical mortar, standing just below the height of an average man, and its large size and weight mean that the usage of a weapons carrier to transport the weapon is highly recommended, although in emergencies it can be manhandled.

UNSC Remarks

"This thing will lob everything from Willie Pete to Airburst, and the best part is it can lob that stuff so dang far."

"Carrying it isn't any fun, so you'd better hope your Warthog doesn't get taken out."

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