Fabric tagging gun

Does anyone have any recommendations for a more industrial clothing tag gun We have tried brand name ones, cheap ones from China and several manufacturers from different retail stores and they all develop the same problem of constantly getting jammed.

We will tag 6000 tags over the course of 3 weeks and we go through about 6 guns . Just looking to see if there is a better option or piece of equipment.

We are tagging index cards to polyester bags.

EDIT: We are tagging polyester bags, not nylon.