Bonus Pack Reward Weapons

You can complete each bonus pack mission with each individual character and get a reward, right? So each character on your account can get 1 item from each bonus mission (plus the 12 extra across your entire account)?

You can continue to complete missions ad infinitum and get all the weapons you want with the BMP

Confirmed. You can do the missions as many times as you want and get the reward weapons each time. You can outfit all your heroes with BMP weapons!

Yup yup

12 characters

Oh, neat.