SAN FRANCISCO (KCBS) — City Attorney Dennis Herrera of San Francisco has filed a lawsuit against three gun accessory manufacturers, claiming they are breaking California’s gun laws.

The lawsuit filed is over the sale of high-capacity magazine repair kits that accept more than 10 rounds of ammunition. In 1999, the state of California enacted the prohibition on the sale and manufacture or import of large-capacity magazines and declared them to be public nuisances.

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However, Herrera said the 1999 law grandfathered in people who already owned large capacity magazines and allows them to have their magazines repaired.

Herrera said that provision is being exploited by three gun accessory companies that sell the magazine repair kits. According to Herrera, these kits are just new, disassembled magazines.

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“The disassembled equipment is intended for easy reassembly by purchasers into complete fully functional high-capacity magazines,” he said.

Representatives for two of the three companies named in the suit had no comment at of Monday. On its website, the third said the California Department of Justice has stated that these kits are legal.

A gun show promoter also has been named in the suit.

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