Maybe Bernie has been right about gun manufacturers

I support Bernie. I also support the same gun control measures as almost everyone on DU does (i.e. background checks, waiting periods, gun show loophole, assault weapons ban, etc.). But I have a hard time understanding why gun manufacturers should be held accountable if someone commits a crime with a gun.

This is not the same as cigarette companies selling a product that they know is dangerous while publicly stating that cigarettes do not cause cancer. Gun manufacturers do not deny their products are dangerous. They produce dangerous but legal products. If a manufacturer makes a gun that is accordance with government regulations, then how are they responsible if the gun is used in a crime?

Also if a gun store obeys all federal and state laws when selling a gun, then why should they be held responsible if the gun is used in a crime?