We look at law enforcement's growing worries about the proliferation of homemade firearms in California and the role of one Nevada-based company, Polymer 80, in marketing the kits to build the weapons. Interviews include the assistant special agent in charge of the Los Angeles. ATF field office, who says half of his investigations now involve these so called ghost guns.

<p>We look at law enforcement's growing worries about the proliferation of homemade firearms in California and the role of one Nevada-based company, Polymer 80, in marketing the kits to build the weapons. Interviews include the assistant special agent in charge of the Los Angeles. ATF field office, who says half of his investigations now involve these so called ghost guns.</p>

KQED serves the people of Northern California with a community-supported alternative to commercial media. We provide citizens with the knowledge they need to make informed decisions; convene community dialogue; bring the arts to everyone; and engage audiences to share their stories.

<p>KQED serves the people of Northern California with a community-supported alternative to commercial media. We provide citizens with the knowledge they need to make informed decisions; convene community dialogue; bring the arts to everyone; and engage audiences to share their stories.</p>