Really! Read the details before you decide to put yourself through the misery or not.
I was able to turn in IB tokens before completion of the quest and helmets were dropping before the quest was over too. Kind of feel shafted after all the stress of needing sniper and machine gun kills :/
Edit: I forgot about the bug preventing us from getting all the weapons. Is that the only purpose? I'm just pretty burnt out on this crap. A few seasons ago, we got Point if the Stag for the headache. This season, nothing but randomly rolled weapons. I instantly dismantled all three of them as they were trash rolls and I already have better for those archetypes anyway.