Lt. Gov. Gavin Newsom Bringing Tighter Gun Controls To November Ballot

SACRAMENTO (CBS/AP) -- Lt. Gov. Gavin Newsom and other gun control advocates say they intend to turn in more than a half-million signatures to qualify an initiative for the November ballot to tighten California's gun laws.

The proposal would make California the first state to require background checks at the point of sale for ammunition, although other states require buyers to obtain licenses and go through background checks ahead of time.

Newsom said Thursday that supporters will start submitting signatures Friday to state election officials.

The measure would also require owners to turn in large-capacity ammunition magazines and report lost or stolen guns to law enforcement, among other provisions.

Opponents say the restrictions would do little to stop killings and would instead make criminals of many law-abiding gun owners.

Newsom is a Democrat who plans to run for governor in 2018.