Have read that gangs now use their youngest members as shooters. The juvenile court system is very weak. Then guns aren't kept for a long time. They get passed around.
"criminals do not often buy guns on the used market, as they have a fear of buying a gun from a source they do not know. Fear of police stings, or from being turned in by law-abiding gun owners leads them to obtain guns from sources they trust, most often, family, fellow gang members, and other criminals. They also found that criminals do not hold guns for a long period, fearing that a gun could be traced to a specific crime."
https://www.nraila.org/article...s-from-legal-sources

That's the thing that always got me about the "passing around" theory. If someone gets nabbed with the gun, wouldn't they pretty much be on the hook for any crimes that can be proven to have been committed with the gun? I wouldn't take a gangbanger's gun as a gift.