http://www.bladeplay.com/item--CRKT-Kit-Carson-M1614ZSF--8239
Variations on the theme...
http://www.bladeplay.com/cat--All-Items--1--1--search=Carson+M16+sf?qty_per_page=100
It uses the Carson Flipper which opens the knife with a flick of the forefinger, much easer than using your thumb.
The SF versions use two Carson Flippers resulting in a true hilt.
.
Every day similarly. Comes in handy for a lot of things. Hope I never need it in self defense.