explain how they are cagey here. >> it is true that the undetectable firearm's act signed by ronald reagan, makes the manufacture, the production of these weapons illegal. you can't enforce the law if you can't see a weapon is plastic. this is a clever way for them to say we are going to hand cuff the police, hand cuff law enforcement so they can't detect when a gun is right in front of them. >> according to what i have been able to read that metal piece can still go through a metal detector and still fire. >> a metal piece can be snapped on and snap back on. snap it off before you go