They already make them..Smart Guns from Germany.
The crybabies of RIU have already nixed the idea because you'd have to wear a watch.
It's way too much to ask.
Yeah I know, they are pretty expensive for one.
Glock, Ruger, Colt, Berretta, Sig Saur, etc., etc. Do not use them nor would they Glocks don't even have a safety and most every cop in the nation has a .40 caliber Glock.
Too many guns to lock them all not to mention their is a black market in America and you can buy firearms. If you have anything of value and do not own a gun you are ignorant cops will not save you junkies have guns. Do you really want to fuck around with a smart gun during a home invasion?? I sure don't. I actually had a friend about 2 years ago got shot to death with his woman in his home by a junky.
Not to mention hunting who is going to hunt with a bullshit smart gun? Lol
Sure you're a women probably live in one of them nice gated communities down in Florida. But we don't all live in nice towns my town ain't bad but you can get robbed, raped or murdered it's all happened in my small town of around 1,000 people, cops take a good 30+ minutes to respond to a 911 call so guns are a must have.
Change the laws for all I care not like I'm above breaking the law anyway. Lol, Better to have one and not need it than not have one and need it.
Not to mention 8 people in Ohio where killed professionally and they grew weed.