I come from a time when anyone could purchase anything (except NFA weapons) at the local hardware store. Yes, even in California. There were no FFL's, there were very few pure "gun stores". You could purchase ammo at any grocery store when you were 12 (or younger) if you had the money. No questions asked.
Guess what...there were less problems then, then there are now.
I think the GCA68 and the NFA34 should be repealed and then just stop worrying about it, It worked for years, why not now?