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The UK alone produces 15% of the parts required to assemble the F35. Around 25% of the jet is manufactured/produced by the other partners of the program.

Heck the F35B only exists due to the UK demanding it. They have access to the source code (and so do Israel).

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Due to political engineering some significant parts are manufactured in partnership countries. That supply chain is also a vulnerability for the US albeit to a lesser degree.
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Excatly and even more they are stripped version. Export version is always inferior.
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Except the Israeli versions obviously. These are at least on par with domestic.
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Iam not sure about this, may be true. But in general exported products are always less capable. Be it f35, brahmos or s400.
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