Vincent Fusca, a big Qanon celebrity, was standing just behind Trump during the shooting. If you watch the video he’s just to the left of the “You’re Fired!” sign and doesn’t react at all to the shots. A lot of Q people think he’s actually JFK Jr in disguise.
Yeah IIRC it was essentially a way for the early government to cheap out on arming an entire army. They allowed private stockpiles of guns so that a few rich dudes could arm their neighbors if need be.