no sane person needs to have 27 guns. that's the issue. start there. you don't need more than a few guns for protection. if you are a "gun enthusiast" (whatever the hell that means) and want to own let's say more than 3 guns, then you need to go through an extended background check and renew them at least annually. In California, if you own an AR-15 style rifle, you need to register it as an assault rifle (by the end of 2018) or make modifications to it. limit the magazine sizes, you don't need 30 rounds to protect yourself in a home invasion. make the firearms training more thorough and comprehensive. establish renewal periods for owners to check in every few years (we do it for our driver licenses). change the legal age to 21. there are so much more than can be done. these are the type of laws we need. second amendment enforced with reasonable limits. no one wants to take anyone's guns, just a bit of common sense.
And, yes I know, criminal can do or get what the want. Laws are for law abiding citizens with the hope of making it harder for criminals.