Oddball Infobox-1-
40px-Terminal.png This article, M821 Death Stalker Self Propelled Anti-Aircraft Gun, was written by Ajax 013. Please do not edit this fiction without the writer's permission.
Fattail SPHAAG
Production information

Masver-Tor Engineering


Self Propelled Hybrid Anti Aircraft Gun

Technical specifications

11 meters


67 tons

Maximum acceleration

0.5 meters per second squared

Engine Power

12 cylinder engine producing 1500 horse Power.


Heavy duty Titanium-ceramic plating with layers of AEGIS, laminate, carbon fibre and heat resistant materials. None Explosive Reactive Armour have been added also.

Sensor Systems
  • Target Acquisition and Designation System, Driver Night Vision System
  • Motion Trackers
  • Sky tracking AESA RADAR
  • Target tracking AESA RADAR
  • GPS
Targeting systems
  • Multispectrum Optical Sensors
    • Optical
    • UV
    • Thermal
    • Night Vision
  • Laser rangefinder
  • SATCOM Uplink
  • Driver
  • Gunner
  • Secondary Gunner



Anti-Aircraft Platform

  • Gremlin (USR)
  • Tenma (USR)
  • Arrestor (Machina)
  • Bereaver (Necros)

Necros War


United Nations Space Command


"Like its namesake its gotta massive freakin tail!"
―Deathstalker gunner

The M810 Deathstalker Self Propelled Hybrid Anti Aircraft gun was a heavily modified Scorpion MBT modified for anti aircraft warefare.

The second major refit of the Scorpion after the Deathstalker, the Fattail (also know phonetically as the 'Sp-hag' and the 'Fatty') uses a Misriah 40mm autogun in a dual set up, complemented by eight Slamdunk SAMs with a computer guidance system that can track air targets and target them without human input. The weapon, although computer controlled, can be taken off and put over to control of the driver, for use should the system malfunction or another, more darker reason. As of late, a growing trend with gunners is to use the guns as anti-infantry guns, the high explosive shells being potent anti-infantry weapons.

The primary armament for short to medium range engagement are two M309 Automatic Cannons. These forty millimetre canons are self loading and can achieve a cyclic rate of 2000 rounds per minute. It fires a mixture of high explosive incendiary and high explosive rounds, to achieve maximum damage against aircraft, often achieving an extremely high kill probability. The cannons are fitted with recoil compensator to keep them stable under high rates of fire. The guns themselves are fitted with highly efficient Doppler cooling system, utilising LASER and the Doppler effect to cool the guns, even under constant fire. The guns can traverse to near vertical, and traverse down slightly, allowing it to engage forces on the ground. The guns can be quick loaded by removing the two ammunition drums through a hatch on the rear and reloading them with two battle ready drums, which are loaded by a quick cycle.

The MIM-44 Slamdunk surface to air missiles are kept in two separate groups of four and, like the guns, can be traversed upwards. These missiles use the RADAR to achieve lock on. Once launched, these missiles continue to use the RADAR, as well as optical, infra-red and ultra-violet seekers, and the ability to act as a jam homing missiles against aircraft attempting to jam the RADAR. The missiles are highly lethal, and can achieve a range of 15 kilometres, and can track via other ground or air based RADARs, without having to use the Fattail's RADAR systems. The missiles can be reloaded from the rear as one tube, or as part of a four missile bloc.


During the mid-phases of the Necros war, as part of Project ARTEMIS, which involved a number of lethality upgrades to a wide range of UNSC vehicles and weapons, the M810 was upgraded to carry two rail guns. Using technology developed from Necros electromagnetic technology, the railguns can achieve a rate of fire that matches the autocannons they replaced. Combined with an array of deadly slugs, including the new KUSANAGI munition.

UNSC Remarks

"Whereas the Deatstalker can't hit shit over 4000m and the Wolverine can't hit shit under 2000m, this thing can hit any stupid bastard in the sky."

"Stupid Romeo Echo Mike Foxtrots never thought what would happen if you fired your smart shot shells and your missiles at the same time. The Shells exploded cos they think the fucking missiles are enemy aircraft! Three weeks of shouting at HIGHCOM and all they do is alter training so guys don't do both at the same time."

"In all my life i never heard 'duka duka' and 'fshwoom' together. Who thought it would work?"

"The missile system makes fly boys go down low, the flak guns make em go six feet under."

Ground Vehicles of the UNSC

Scorpion & Variants

Scorpion MBT | Scorpion ARRV | Scorpion AVE | Scorpion ARC | Death Stalker SPAAG | Monitor AVP | Komodo AVP | Panther CAV

Heavy Tanks

Tiger HBT | Razorback Siege Tank | Mammoth Siege Platform

Warthog Knight FAV family

Warthog FAV | Warthog Knight LRV | Gauss Hog LAAV | Rocket Hog LAAV | Guard Hog Crusader | Warthog Assassin RAV | Warthog Troop Transport | Tread Hog DTV | Warthog Medical Vehicle | Warthog Ammunition Carrier | Spark Hog MEWS | Fire Hog CB-RADAR| Warthog Recovery Vehicle | Warthog Flatbed Truck

Motorized Vehicles

Mongoose ATV | Gungoose ATV | Jackrabbit ATV | Gunrabbit ATV | Armadillo PTT | Buffalo HSV

Unified Combat Reconnaissance Vehicle

Coyote CRV | Stallion CRV | Bloodhound CRV | Puma ATV | Caracal ICV | Chameleon RV | Wallaby MEV | Ocelot AAA | Capybara C2V | Camel ASV | Bandicoot MLV | Elk REV | Mustang MGS | Manx MEWS | Boar MC

Personnel Carriers

Crocodile IFV | Mastodon APC | Bison APC | Jaguar Command Vehicle


Wolf ATAAS | Mule Cargo Loader | Mantis ADS | Cyclops HAS | Dragon ADS

Artillery and Anti-Air

Wolverine SPAAA | Bombardier SPMA | Firefly MLRS | Kodiak Heavy Artillery | Diamondback MADS

Elephant and variants

Elephant HRV | Behemoth ICP | Aurochs HAP | Alpha C2P | Omega MMP | Hippo MFH

Riverine and Landing craft

Swordfish RIB | Pike PB | Walleye PB | Orca-class Landing Craft Air Cushion

Naval Craft

Barracuda-class Corvette | Mako-class Frigate | Stingray-class Amphibious Assault Ship