I have said this countless times but I will repeat it once more. A "legal" gun buyer is simply an adult US citizen, that can pass an NICS BG check and may later wish to purchase a gun or ammo. Simply indicating on ALL state issued, photo IDs if that citizen is "GUN OK" after passing a NICS background check would suffice, it also makes it EASY to control (limit) ammo sales as well. This system works for driver's licenses, we do not retest each driver everytime they are stopped while driving, we simply check their ID, to see if they are allowed to drive. This system works for selling alcohol and tobacco, we simply look at the ID to determine if the buyer is of legal age. This system even works for cashing checks, boarding commercial aircraft and registering to vote - we simply look at the person's valid, state issued, photo ID and make informed decisions as to their identity and residence. Why we need to repeat this NICS BG status check at the point of sale, each time, and for ONLY guns is insane. The status can change from GUN OK to not so only after conviction for a felony (or drug charge), being adjudged mentally incompetent or serving a judges restraining (protection) order for domestic abuse; on those rare occasions, simply take away that person's state issued, photo ID and update the NICS database.