Do-it-yourself 'ghost guns' bypass background checks and firearm registration

An ATF agent poses with homemade rifles, or "ghost guns," at an agency field office in Glendale, Calif. There's a growing industry of companies that sell gun kits, instructions and do-it-yourself components online to help people build their own guns.
An ATF agent poses with homemade rifles, or "ghost guns," at an agency field office in Glendale, Calif. There's a growing industry of companies that sell gun kits, instructions and do-it-yourself components online to help people build their own guns.