Can't reload the HMG after using all the ammo.
If you got an M2 pack in your backpack, you can't "reload" the HMG (sound + HUD animation) but you won't see the reload animation on the gun. But after it is "done" the gun is not reload.
If you drop the M2 pack in the "HMG inventory" (basicly the vicinity in the end ?), it won't allow you to reload the gun at all (no sound, no HUD animation, nothing...)
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