Roberti-Roos Assault Weapons Control Act of 1989

The Roberti-Roos Assault Weapons Control Act of 1989 (AWCA) is a California, United States, law that made illegal the ownership and transfer of over fifty specific brands and models of semi-automatic firearms classified as assault weapons. While mostly rifles, some were pistols and shotguns. The law was amended in 1999 to restrict acquisition and transfer of magazines that could hold more than 10 rounds of ammunition. Firearms and magazines that were legally owned at the time the law was passed were grandfathered in if they were registered with the California Department of Justice DOJ.

There are three categories of assault weapons under California law:

The 'Roberti-Roos Assault Weapons Control Act of 1989, was augmented in 1999. It has also inspired follow-on legislation such as .50 Caliber BMG Regulation Act of 2004 and further restrictions on semi-automatic firearms. From the website of the California Attorney General's office:

Effective January 1, 2000, Senate Bill 23, Statutes of 1999, establishes new criteria for defining assault weapons based on generic characteristics. This bill allows and requires persons who own/possess firearms that fall under the new "assault weapon" definition to register those firearms with the Department of Justice during the one-year period between January 1, 2000 and December 31, 2000. Effective January 1, 2000, this bill adds Penal Code Section 12276.1 to the Penal Code.

The following designated semiautomatic firearms are defined as assault weapons by Penal Code section 30510:
(a) The following specified rifles:

(b) The following specified pistols:

Other firearms are banned from sale or possession by certain characteristics or configuration as determined by parts or features. If an undefined firearm is modified with any of the following characteristics, it can subsequently be classified as a banned assault weapon. These are as given in Penal Code section 12276.1 and 30515:

The amended legislation included the following:

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