I'm not sure if this has been suggested before, but it seems like the utility of some sort of ammo counter would be very nice for games that have weapons you must reload and keep track of how many shots are going out, yet ammo isn't so scarce to the point you tirelessly conserve it. For example, you can have a macro inside of your damage macro that can subtract a number from your total amount of ammunition. When that count hits 0, it will subtract from another number (your total amount of magazines/cartridges/etc.) and then replenish your ammunition. If that count hits 0, suddenly you're out of bullets. I'm not sure how Roll20 is coded, but from my perspective implementing this seems fairly easy and would have multiple applications beyond just an ammo counter. It could double as a timer, an alternative health system, etc. I'm aware that you could always record all of this yourself, but as a newer player I often have a hard time keeping track of how much I'm shooting something, especially when I usually never need to reload in combat. If there's a way to use attributes in this fashion, that would be super awesome ... but as of right now I'm totally unaware of such a method.