State and federal legislators, along with President Barack Obama, have proposed several new gun control laws since the Sandy Hook school shooting. Here is a summary.
AB 180: Taxes ammunition sales and directs resulting revenue toward efforts to fight crime.
SB 108: Requires gun owners to store firearms with a trigger lock or in a lock box.
SB 53: Mandates that purchasers get a permit before buying ammunition.
SB 47: Expands types of guns defined as assault weapons, which are generally illegal to buy in California.
AB 48: Bans sale of tools that can convert ammunition magazines to contain more than 10 rounds; mandates reporting of ammunition purchases to Department of Justice and requires ammunition buyers to show identification.
Assault Weapons Ban of 2013: Bans assault weapons and high- capacity ammunition magazines. Its provisions are generally in effect in California.
Require background checks for all gun sales. Gun buyers already must submit to a background check when purchasing from a licensed dealer. Obama would extend that requirement to purchases from private sellers and gun show dealers.
Strengthen background check system. Studies have shown that the national database used for checks is likely missing millions of mental health records.
Encourage more research on gun violence. Congress has previously barred the U.S. Centers for Disease Control and Prevention from using funds to "advocate or promote gun control."