The FV721 Fox was a British armoured car designed to replace the older Ferret and Saladin armoured cars in the British inventory in 1965. Entering British service in 1975, its most notable trait was that it was incredibly mobile for its weight class, having a top speed of over 100 km/h. Made mostly out of aluminium, the Fox only offered protection against small arms fire and shrapnel, but as an air-liftable, mobile reconnaissance vehicle this was not a particularly glaring flaw. The Fox was withdrawn from British service in 1993–1994, although it still serves today with Malawi and Nigeria.

The Fox was introduced in Update 2.35 "Alpha Strike", filling a wheeled light tank-sized gap in early Cold War British line-ups. Its aluminium construction means the Fox is vulnerable even to 12.7 mm HMG fire, although its 32 HP/t power-to-weight ratio and 104 km/h top speed make it one of the best flanking vehicles at its tier. Its 30 mm RARDEN is unstabilised and has a slow rate of fire, but its APHE shells are tracerless and have good filler on penetration, rewarding successful flanking plays further. While its APDS belt can provide more flexibility when dealing with enemies frontally, the Fox's lacklustre protection and lack of a stabiliser hold it back from aggressively taking positions on its own.