I think that if you or I could buy guns, then there’d be a lot of guns around, and getting one would be a lot easier.
People here attempt to commit crimes with knives, replicas, ancient WW2 things that don’t work, all sorts. Not M16s or Glocks.
Many crimes are committed by people who’ve never committed crimes before, and hence have no record and are able to help themselves to guns in the USA.
What amuses me is how many people in the US think that simply owning a gun protects you in some way. The is an argument that it makes you more likely to get shot yourself if your assailant thinks you might shoot him.