I don't live in the US, but I'm skeptical.
There are a lot of places where civilian gun ownership causes problems, gun crime, etc. Some of the places where it does not cause big problems (eg Switzerland) have liberal gun laws and high ownership rates.
There are examples where widespread gun ownership/availability causes exactly the kinds of is "problems" that (according to some) the American founders intended it to cause. Basically, armed revolutions.
There are confusing examples where laws are liberal but ownership is rare. There are opposite examples.
I'm not saying ignore all this. If you want to learn about policy areas, you need to study examples. Just beware the anecdote, attributing cause and effect. Beware within heated political debates, they are known to cause insanity. There is rarely some objective fact that proves your argument, just a collection of facts that may, taken in context, convince you.
Back to drugs policy, Portugal had its own set of cultural norms, problems they were trying to solve, political considerations...
I think Mexico and some other big transit countries need to look at radical liberalisation options. Portugal is a good guide for some of their issues, but overall their situation is very different. They have nasty problems with the wholesale dealing, and the organized crime that goes with it. The street level crime and consumption is not their biggest problem, like Portugal.