Does American military equipment come with a kill switch?

The UK and Europe buy a lot of military equipment from the USA, they're actually contracted to do it as part of the NATO agreement. Rising tensions between Europe and the USA have raised concerns about getting spare parts and maintenance for equipment.

There are also online rumours a lot of it comes with built-in kill switches so America can render it useless. The USA denies this, but they would, wouldn't they?
It's an Internet myth, there are no kill switches
Of course it's true, they wouldn't sell stuff that can be used against them
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Does American military equipment come with a kill switch?
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