California lawmakers had another busy year passing gun-related legislation. Gov. Gavin Newsom, a staunch proponent of gun control, signed more than a dozen bills one day this fall.

Most of this year’s gun laws expand existing regulations, but the changes they enact could have sweeping repercussions for gun owners. They increase fees, expand the state’s “red flag” and gun-storage laws, raise the legal purchase age and set caps on the number of guns Californians can buy.

New gun laws, widely supported by the state’s large politically liberal population, haven’t always gone smoothly for California’s estimated 4.2 million gun owners and another 3.1 million adults who live with them.

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Recently, tens of thousands of gun owners have been blocked from buying ammunition under the spate of gun-control laws that Newsom championed as he was gearing up to run for governor.

The Sacramento Bee first reported earlier this month that one in five Californians have been denied buying ammunition, usually for errors and omissions in the database used in the state’s new background check program, which took effect July 1.

Here’s a list of the gun laws California lawmakers passed this year and when they take effect.

New gun laws for 2020