the /ammo command seems workable and useful, SE get on it. As to the comment on nin tools, while I agree it would be just as nice I think it would be much harder to do. Ammo has a slot, nin tools are just in your pack, I imagine a system check without an address would be much harder to implement. Still, if you can, do it SE, please.

Or, just as likely, don't require a command, make it an automatic countdown when you reach 10 left. Then we all know not to Barrage when we only have 2 ammo left.