According to the "B" Mission in Tarkin Initiative wording can multiple different figures use the Weapon tokens in a single activation. So, for instance, Han's "Return Fire." If something uses a weapon token on the attack and he has a weapon token can he use it on the return fire?
According to the wording the entire weapon section has the subsequent phrase "Limit once per activation." I would assume the spirit is that it means you can't BT to Volley with a bunch of free dice, but the fact that it's a standalone statement would mean by the letter that only one attack would be able to obtain that extra dice.