New video footage of the ISIS weapons lab in Raqqa, Syria, shows the terror outfit has managed to produce several advanced weapon components, including a thermal battery for use in surface-to-air missile systems.

The footage shows that ISIS can recommission thousands of missiles that were believed to be unusable. The terror outfit is apparently capable to using these missiles to target passenger and military aircraft, reports Fox News.

The video footage, obtained by Sky News, was seized by the Free Syria Army when it captured an ISIS trainer on the way to Europe via Turkey.

”What this video shows is that ISIS are leagues ahead of their terrorist predecessors,” Chris Hunter, a former bomb technician with the United Kingdom Special Forces, told Sky News. Hunter said ISIS’s advanced knowledge of weapons engineering and their seemingly limitless ability to reverse engineer and recondition weapons are a source of worry.

According to Sky News, the ISIS R&D team has also produced remote control cars to act as mobile bombs. These cars are fitted with “drivers” – mannequins with self-regulating thermostats that produce the heat signature of humans. This allows the car bombs to evade the sophisticated scanning machines protecting the Western military and government installations.

Backed by ISIS’s long history of using truck and car bombs, suicide bombers and IEDs, the latest discovery of its scientific abilities is the stuff of nightmares. ISIS is already known to possess mustard gas and potentially other types of chemical weapons.

Hunter says whether or not these weapons will work every time is yet to be seen. However, if ISIS has managed to achieve the previously unachievable, the real fear is that they're certain to find their way into the hands of jihadi organisations and networks outside Iraq and Syria.