Designed by Brian Tighe and made by CRKT. I got it from AG Russell during customer appreciation week. The blade is AUS8. The first one that came had a flaw in the lock so I sent it back and this second one has a little resistance in the flipper, but is a great knife. The lock is on the top and the lines of the knife create the spring that holds the lock in place (look really carefully at it). It's a very interesting and cool design. Brian Tighe is not only a great maker, he is a gentleman of a guy. There are blue accents all over the knife and it looks really nice in person.