1) Fingerprint reader. A lot of phones have fingerprint recognition these days--and I'm sure everyone who has one has had non-reads with a fair amount of frequency. And it takes time--time you likely won't have in an emergency. And what if your finger is injured? Your gun is now useless. And what if the battery is dead?
. . .
You stop kids from firing a gun by locking them up.
The only time my phone failed to respond to my fingerprint was when I forgot to take a glove off!
And the fingerprint is MUCH MUCH faster than unlocking a cabinet.
No, I do not particularly support fingerprint locks on guns. I just get tired of all the
"Nope. Cain't do it. God-given freeedumb. Best solution is giving every white American a Glock 19 on his twelfth birthday."
A better model is an NFC ring with a trap switch.
Essentially, you put on the ring and that pushes down a leaf switch (think, the switch in your fridge that turns the lights on/off), and then you use your phone to activate it.
The switch flips out if you take it off, and it stops working until you pair it with your phone again.
It would be something like school ring sized, and quite frankly, I would honestly prefer that insofar as then it would be clear who was so psychotic as to own and potentially carry a gun, and unlike every other open carry, this one would not call out for theft.
It would rightly terrify people, but the fact is people have a right to be terrified that you would bring a gun around!
Then, instead of a fingerprint you just have to have the ring near the handle, maybe within 3 inches?
If someone takes the ring, they still can't use it, because they can't reset the mechanism once it's been triggered.
The problem here is that then, someone in a household could be a gun owner, and leave the gun about as an abusive threat that produces no challenge to their power because only they can use the weapon.
Honestly, I would rather that instead of personalized weapons, we just have no such awful weapons about.