if they can carry ammo.
i picked up an ammo box at the start of chasm logistratum, and then found another one. ammo comes handy during the long rail section, so i pinged the other guys to pick it up. apparently smacking a bunch of zombies was such a load, i had to ping 7-8 times and type “ammo” until one came finally. i showed him the box i was already carrying, so he picked the other one up… and dropped it open at my feet.