Quote Originally Posted by Adawg38 View Post
So correct me if I am wrong here but understanding the definition of Gravity Knife even most knives owned and carried today that are not auto are also illegal for non military or LE. Am I reading this correct? What I am understanding as a Gravity Knife would be pocket knives with a pocket clip that uses your thumb to flip open whether it is assisted or manual.
Gravity knives were popular back in the '40s and issued during WWII to some airborned units. It is a knife that you would hold by the handle end downward and with a push of a button, the blade would slide out and lock into place by gravity. You could use the knife with one hand to cut yourself out of your parachute if necessary. Here is a pretty good Youtube video on them:

http://www.youtube.com/watch?v=RZjXuiC8t1E