BulletCount
No arguments
Return 0-N (number of bullets in the magazine.) Will cause compilation error if your prop doesn't have bullets. You must define BLASTER_SHOTS_UNTIL_EMPTY for this to be available.
BlasterCharge
https://github.com/profezzorn/ProffieOS/blob/6f8add544c627172ad2dd698c90e5e55078a420a/functions/bullet_count.h#L8