As quoted from Mechwarrior 4: Mercenaries...

CLASS: Inner Sphere Light

ARMOR TYPE, TONNAGE: Ferro Fibrous,4.5

INTERNAL STRUCTURE: Endo Steel

MAX SPEED (KPH): 132

GROSS TONS: 20

WEAPONS:

    Sm Laser (2)
    MG Array (3)

COMPONENTS: None

JUMP JETS: No

FIELD NOTES: Once rare in the Inner Sphere, the Flea has been appearing in greater numbers in the past decade, mostly in the regiments of Wolf ’s Dragoons.Weighing 20 gross tons, it is easily the smallest ’Mech you ’ll see on the battlefield. The Flea is an inexpensive chassis to procure, but because it is lightly armed and comparatively slow for a light ’Mech,its role is usually little more than light reconnaissance.