“I have read on another public forum where an anti-gun critic claimed that an AR-15 can be converted to automatic by simply removing a pin.”
That was from the Libertarian Vice Presidential candidate, William Weld:
http://gunwatch.blogspot.com/2016/08/liberterian-vp-candidate-video-gun-ban.html
Jeez, what a moron. He ought to run for president under the communist party because he is so ignorant and doesn’t want to know the truth.