Add `ammoCount` to Item and fallback to the item's ammo count when inside a chest / locker / player inventory (other than hotbar) Track all items on the server in `ItemManager.serverItems` dictionary so the item can be updated every time the `BaseProjectile` ammo is modified (normally it only can find item when inside player inventory) Save ammoCount in protobuf as an Int where 0 = null, 1 = 0, etc (since protobuf doesn't support nullable types)