As quoted from Mechwarrior 4: Mercenaries...

CLASS: Inner Sphere Assault

ARMOR TYPE, TONNAGE: Ferro Fibrous, 18.0

INTERNAL STRUCTURE: Endo Steel

MAX SPEED (KPH): 53

GROSS TONS: 100

WEAPONS:

    Lg Laser (2)
    Med Laser (3)
    Heavy Gauss Rifle (2)

COMPONENTS: None

JUMP JETS: No

FIELD NOTES: Borrowing heavily from the design concepts of the Atlas, the Fafnir epitomizes the Lyran philosophy of designing for size and strength rather than finesse. Topping out at 100 tons at full loadout, nearly 20 tons of which is armor, the Fafnir is impervious to all but the heaviest (or luckiest) shots. The Fafnir carries tremendous firepower and makes for an excellent brawler in one-on-one combat. It is the only ’Mech to carry two Heavy Gauss Rifles.