I know a few years back, one of our local gun stores was robbed after hours. Stole over 50 firearms. Didn't go through the doors or windows though. They brought a cutting torch and cut a hole in the side of the metal wall, lol.

Criminals just aren't going to kowtow to society and rules, no matter how many laws are created, it's frustrating for sure.

While I'm sure, a few have been illegally sold over the years, I don't think most that are registered to dealers are dirty sales, I think most are stolen.