The vote comes in response to a series of mass shootings that have taken place across the nation.
Californians buying guns from out-of-state sources would have to go through the same steps required for in-state purchases under a bill passed Wednesday by the state Assembly.
California lawmakers are now focusing on the bullets, instead of guns, as they continue to try and curb gun violence.
California lawmakers promised Tuesday to move cautiously as they consider tighter restrictions on handguns, assault rifles and ammunition purchases.
Huge crowds are expected this weekend at the first local gun show since the Newtown shootings.
The White House is expected to respond to a petition calling for British CNN host Piers Morgan to be deported after it receives over 39,000 signatures.