How have executive orders affected gun control and gun rights?

Executive orders that have affected the 2nd amendment are rare. Those that exists have both dealt with weapons that are now termed "Class-3" weapons, or weapons that can fire continuously by holding the trigger, weapon suppressors, and short barreled weapons.

The result is the current machine-gun ban of 1986, and the original class 3 registration that was forced in the 1920's (I believe. Could be wrong on that last date)