I read this last week on the news site that shall not be named. My first reaction was quick and instinctive. "Haha. BATF said so. Only the receiver is the gun. Haha"
Then I got scared. "Uh oh. That bit of bureaucratic minutia is best kept on the QT."
Last thing we need is grabbers petitioning for a change in definition to include bolts, barrels and the up thing