Let me explain! You basic rapid fire that you use on the right trigger can be used on a tac, b button, rs ,RB ,lb,LT but the only difference is you have to make sure it is on a loop and feather the triggers all the way on in the editor! Meaning click on the dot on (both ends of the macro this needs to be done)the rapid fire macro in the editor in which it pulls up a slide bar which is the trigger feathering and slide it to full representing the trigger! Then it will work on those functions! You don't need to assign your triggers to b button just put the macro on the button you want the rapid fire on! It still will perform the function that it is supposed to do first then it will fire !