Beowulf wrote:Picture these scenarios:
Guns made in Mexico, and shipped up hidden in cars. No way to tell they are there. No smell, the car's made of metal already.
Who needs smell? A trunkload of guns is not as easy to conceal as tiny bags of cocaine, and the risk/cost/benefit ratios for the smuggler are nowhere near as good. We're talking about bulky, heavy equipment. You could probably use various magnetism-based sensors to determine that a car's trunk has a lot more metal in it than usual.
Guy works at a machine shop by day. Stays after shop closes to finish up some pieces for a customer. Then works on making some cheap frames for handgun. Then sells it on black market for enormous markup.
Oh yeah, as if you're going to get high-volume production out of that. If isolated activity like that was the entirety of the black market, it would be a big improvement already.
I will note at this point that in some countries, gun manufacturing is a cottage industry.
So's cocaine manufacturing. Doesn't mean it's impossible to stop or that we shouldn't bother trying. And we can outright ban homemade guns; no responsible person will want to own one, and it's a perfectly legitimate public safety concern, even if some of the extreme right-wingers will cry foul.