L.A. Gun Buyback Nets a Rocket Launcher

Is it amazing to anyone else that there was a rocket launcher out there to be had? I presume it was only for self-defense and/or hunting, right? Maybe quail? From the Los Angeles Times: "A one-day gun buyback event in Los Angeles on Wednesday gathered 2,037 firearms, including 75 assault weapons and a rocket launcher, officials said. The total was nearly 400 more weapons than were collected in a similar buyback earlier this year."