This article is about the BattleMech. For the sidearm, see Smith and Webley Foxfire.
Alert icon orange.svg Apocryphal
The subject of this article is exclusively described in apocryphal sources, i.e. in official BattleTech products that do not fall under the current definition of canon.
Consequently, the subject of this article may not be canonical. See the article's section on Canonicity for details.
Production information
Manufacturer Defiance Industries of Hesperus II
Model FXR-4R
Class Ultralight
Cost 1,278,972
Technical specifications
Mech type Inner Sphere BattleMech
Mass 15 tons
Chassis Chariot Type XA
Armor Lexington Limited
Engine Magna 135
Communications System TharHes Piccolo I-2
Speed 142.2 km/h

1x Small laser
1x Flamer

BV (1.0) ?
BV (2.0) ?


The Foxfire is the brainchild of Karl von der Burg, a tech with Defiance Industries who had created the design - one of the fastest BattleMechs in existence - in his spare time and presented the result to the corporate executives. The specialized design was put into production prior to the First Succession War, only for the military to wonder what they should do with it and assigning it to reconnaissance units for its speed. Later, when incendiary lances were formed, almost every 'Mech or tank regiment in the Lyran Commonwealth had a Foxfire lance attached to it.

Although out of production for at least half a century as of 3025, several thousand Foxfires are thought to remain in service, mostly in Commonwealth space.

Weapons and Equipment[edit]

Although it carries a head-mounted Magna Mk I small laser, the Foxfire was primarily designed as an ultra-fast platform for its center torso-mounted Firestorm flamer. Two and a half tons of armor provide some minimal protection.


There are no known variants of the Foxfire.


The Foxfire was described in the StarDrive magazine, and mentioned in passing as FXR-4R Foxfire in one issue of BattleTechnology. Since neither magazine is currently counted among the canonical sources for BattleTech, the 'Mech itself is not currently considered canonical either.