this good 4 trolling team based games
what u do is switch 2 war machine then select death machine then just press right on D-Pad to keep switching between the two and it will keep say friendly death machine/war machine is out with ur name popping up - usually only happens once when u first time get it but this glitch makes the game think u all ways get it for the first time which results in the ammo glitch it resets all the time.
just just tap the shit out the right d-pad button once u do glitch it will annoy the shit out of the enemy team and ur team mates