The lawsuit says the state is now home to 18 of the 80 known online ghost gun retailers.

SACRAMENTO, Calif. (AP) — Backed by the fathers of two slain children, California's attorney general sued the Trump administration on Tuesday in an effort to crack down on “ghost guns” that can be built from parts and make it difficult to track or regulate owners.
The U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives doesn't consider the do-it-yourself kits to be firearms, so buyers don't have to undergo the usual background checks and in most states the guns are not required to have serial numbers

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Bill