I find the thumb stud to be almost useless by itself on knives like the M16 and such. It is just placed too close to the knife handle for me to work smoothly.
Having said that however, I do like the AO on the M16 as it works well with gloved hands to pivot the blade out away from the handle a bit. I can then catch the stud with my thumb and open.
I'm not a big fan of the wrist flick opening deal as it aggravates some nerve damage I have in my forearms/wrists. Particularly with how much I use my knife during a days work.
Wayne
Having said that however, I do like the AO on the M16 as it works well with gloved hands to pivot the blade out away from the handle a bit. I can then catch the stud with my thumb and open.
I'm not a big fan of the wrist flick opening deal as it aggravates some nerve damage I have in my forearms/wrists. Particularly with how much I use my knife during a days work.
Wayne