Will the K19 Plate Carrier accept standard MOLLE pouches? Does the K19 Plate Carrier accept hanger/dangler style pouches?

MOLLE pouches - Yes, the K19 Plate Carrier can accept standard MOLLE pouches as well as hook backed placards.

Hanger/dangler style pouches - Yes, you can fit those pouches either on the front loop overlay or inside the plate bag.