Fenrir BA LTMEG.png
Production information
Manufacturer TharHes Industries [1]
Production Year 3060[2]
Use Assault
Weight Class Assault
Tech Base Inner Sphere
Cost 500,000 C-bills
Introduced 3060
Technical specifications
Mass 2,000 kg
Top Speed 43.2 km/h

1x Configurable Turret Mount

Armor Type Standard
BV (1.0) Machine Gun = 26
Small Laser = 36
Small Pulse Laser = 34
Medium Pulse Laser = 55
SRM-4 = 48
Mortar = 32
ER Medium Laser = 67
BV (2.0) Machine Gun = 29[3]
Small Laser = 40[4]
Small Pulse Laser = 37[5]
Medium Pulse Laser = 58[6]
SRM-4 = 51[7]
Mortar = 36[8]
ER Medium Laser = 71[9]


The Fenrir was, in many ways, the successor to the failed Sloth battle armor design. Following the secession of the Lyran Alliance in 3057, Archon Katherine Steiner-Davion ordered the production of a new battlesuit to better underscore her new realm's independence from the Federated Commonwealth. Thanks to its lack of success and the fact that the Federated Suns half of the Commonwealth never liked it, the Lyran design team had many Sloth battlesuits to work with when development began on 9 November 3057. Identifying the only positive aspect of the Sloth - its stability and capacity to carry tremendous firepower - the team focused their efforts on accentuating these features in its heavier successor. Design and production of the first prototype began on 22 October 3058, with final mass production starting 4 January 3060.[10][11][12]

Named for the demonic wolf of Germanic myth, the Fenrir was less a traditional battle suit and more a mobile fire support platform. The trooper controlling the suit was situated inside a cramped "cockpit" and piloted the Fenrir like a small walking tank. The single, configurable turret mounted on the suit could accept a wide variety of weapon configurations and the Fenrir's sturdy, powerful legs could propel it to much greater speeds than the Sloth. While the design team initially tried to increase the armor protection on the Fenrir, this was sacrificed to accommodate the increase in firepower. The weak armor protection was considered acceptable given its intended role as a hit-and-run fighter; in true Lyran tradition Fenrir pilots were encouraged to use overwhelming firepower to defeat their enemies before they could exploit this weakness.[10][11][12]

The Fenrir had a great effect on the battlefields of the FedCom Civil War against Allied forces. Its interchangeable weapon packages allowed these suits to bring tremendous firepower against a variety of targets. The suits also accounted well for themselves during the Jihad, and achieved legendary status in the ultimately futile defense of Defiance Industries on Hesperus II.[10]

Weapons and Equipment[edit]

The Fenrir features a dorsal Modular Turret Mount, similar to the configurable mounts found on humanoid battle armor designs, with a 300° field of fire. It carries a heavier arsenal than its progenitor, which can be configured in a number of different ways. For use against conventional infantry or other battlesuits, the Fenrir can carry a trio of Machine Guns or Small Lasers or twin Small Pulse Lasers. Against armored targets, a Medium Pulse Laser or SRM-4 with four reloads provides withering firepower. Starting in 3064 the Fenrir could mount two additional weapon configurations: an ER Medium Laser that can hurt opponents from a distance, or a Heavy Mortar to provide indirect fire backed up with a Machine Gun for self-defense.[10][12]

The 250kg of armoring carried by the Fenrir offers the same amount of protection as on the Sloth. This includes the suit's legs which, while appearing to be quite resilient, are actually fairly vulnerable to weapons fire. The minimal armor protecting the Fenrir and its legs were necessary features to in order to mount more and heavier weapons. Also like the Sloth, the Fenrir's quadruped design prevents it from making anti-'Mech attacks or traveling via OmniMech handholds.[10][11]


  • Fenrir "Longshot" 
    Developed in 3076, this version uses an experimental Battle Armor C3 System to coordinate targeting information. The main armament has been replaced with a pair of Clan-spec LRM-5 launchers equipped with enough ammo to fire two salvos each. It also adds an extra 100kg of armor. BV(2.0)= 120[13]

Related Designs[edit]

Fenrir II - This upgrade of the venerable battle armor was created as a bet between Archon Adam Steiner and Duke Vedet Brewster.[14]


In German products the unit's proper name was translated to Fenris, which is in Germany the more commonly used name for the mythological wolf. This was done despite the mix-up it creates with the Inner Sphere (Fenris) name for the Ice Ferret, which was used unaltered in German products.



  1. Technical Readout 3058 Upgrade p.37
  2. MUL online date for the Fenrir
  3. Record Sheets: 3058 Unabridged (Clan & Star League), p. 63
  4. Record Sheets: 3058 Unabridged (Clan & Star League), p. 66
  5. Record Sheets: 3058 Unabridged (Clan & Star League), p. 67
  6. Record Sheets: 3058 Unabridged (Clan & Star League), p. 65
  7. Record Sheets: 3058 Unabridged (Clan & Star League), p. 68
  8. Record Sheets: 3058 Unabridged (Clan & Star League), p. 64
  9. Record Sheets: 3058 Unabridged (Clan & Star League), p. 62
  10. 10.0 10.1 10.2 10.3 10.4 Technical Readout: 3058 Upgrade, pp. 36-37, "Fenrir Battle Armor Profile"
  11. 11.0 11.1 11.2 Field Manual: Lyran Alliance, p. 144
  12. 12.0 12.1 12.2 LosTech: The MechWarrior Equipment Guide, p. 78
  13. Experimental Technical Readout: Steiner, p. 16
  14. Technical Readout: 3145 Lyran Commonwealth, p. 8-9, "Fenrir II Assault Battle Armor