Where Did the LA Rocket Launcher Come From?

At best, gun buybacks remove broken ass guns from homes with kids. At worst, they create a black market for stolen firearms, torpedo criminal investigations, waste tens of thousands of police man hours and suck-up hundreds of thousands of tax dollars. That said, the appearance of a rocket launcher at LA’s buyback program is an interesting black swan. Or is it? It’s an inert training tube that could have been purchased at an Army surplus store. What does that tell you about LA’s gun buyback program?