Putting aside moral issues with the CIA, what's the legal reason that they should not be operating military hardware? As far as I know, CIA assassinations of f

Putting aside moral issues with the CIA, what's the legal reason that they should not be operating military hardware? As far as I know, CIA assassinations of foreign citizens aren't illegal as long as they take place outside of the US. There was at least one instance of a drone strike killing one or two American citizens which is definitely extra-judicial. Most drone strikes do not kill American citizens so referring to drone strikes in general as extra-judicial doesn't seem accurate to me. I would like to clarify that I don't necessarily think that the US's use of drone strikes is morally correct. I just think it's not correct to refer to it as extra-judicial.