Does Agent Kallus add a die with Quad Laser Turrets?

Yes.

Its an Attack.

Yes, as counter is an attack. Howlrunner supplying a die to an interceptor's counter is a prominent example of this interaction.

Edit: **** it, Dras. You weren't here when I started.

Ref also:

https://community.fantasyflightgames.com/topic/227038-agent-kallus-quad-laser-turrets/?hl=kallus

I thought so, but wisdom is wisdom, so I thought I'd ask :-)

Edit: **** it, Dras. You weren't here when I started.

62 WPM tested.

Edit: **** it, Dras. You weren't here when I started.

62 WPM tested.

Oh, I'm upper 60 WPM, on a physical keyboard.