Utilize the input text as a context reference, choose the right relationship between 'Airbus' and 'aircraft' from the options.
Options: distribution format, product/material produced, employer, owner of

Airbus has told buyer nations of the A400M transporter aircraft that it cannot deliver all of its high-tech defences according to plan, casting a shadow over some of its military uses as Europe battles growing instability on its borders.
product/material produced