Anyone test out the Tankman Shield yet?

Topic basically. Does it carry through area changes? Swap? How much per stack/kill? Max stacks/kills?

Well, that sucks. It doesn’t work at all. It does literally nothing, whether one kill or 50.

It stacks, but it’s weird. I’ve gotten up to doing 6k in Body shots from 1801 Card Damage. However I can’t figure out if there’s a stacking limit or you have to reload after a certain amount of kills to get the bonus.