San Francisco police were handed a few unexpected firearms during a Saturday gun buyback: An AT-4 a.k.a. a Bazooka-like anti-tank weapon, a rocket launcher and a cannonball.

The weapons were turned over to officials during a "no questions asked" gun buyback event in San Francisco.

A picture on the @SFPDCares Twitter account shows an officer holding and peering down at the weapon.

Police said that was one of 280 firearms turned over during the gun buyback, which was hosted along with United Playaz, a San Francisco-based violence prevention and youth development organization.

United Playaz is a violence prevention youth organization.

"I am not against the Second Amendment but I am against senseless gun violence," said United Playaz executive director Rudi Corpuz Jr.

Each person who turned in a handgun received $100 and each person who turned in an assault weapon received $200.

According to Corpuz, all promotions for the event were done by 10 men who were serving life sentences and are now on parole.