I'm trying to figure out how to give everyone the flashbanger perk from squaddie level. I have figured out how to give it to all the "normal" classes, but I cannot get it to take for my psi operatives.

To reiterate, I'm not trying to just use the AWC, I want to add it as a perk that they can get as soon as they finishing the initial training.

Does anybody have advice or suggestions on how to make this work?