I only have 5 AO knives right now. My ZT0300 is definitely the most "impressive" opening. It has a slower opening speed then my other AO's but when it locks into place, my whole arm up to my shoulder moves. Quite authoritative! Throw in the loud "thwack!" of the titanium lockbar and that is my choice for "best".
The next 3 AO's, a CRKT Folding Hissatsu, Kershaw Blur CB and Kershaw Leek, open quite fast. The Hissatsu is almost violent in its opening with its thick torsion bar but feels unrefined and a bit gritty. The Blur and Leek since they are smaller open fast but the sound is softer but the Blur is much louder than the Leek. The Leek opening sound is more of a soft "snick", the Blur is a pretty standard "click" and the Hissatsu is a "Pow!".
And lastly, my old SOG Flash 2, well, the AO is less than smooth although it opens fast enough I guess, but it just feels and sounds cheap.
I had more AO's in the past but none worthy of note.
The next 3 AO's, a CRKT Folding Hissatsu, Kershaw Blur CB and Kershaw Leek, open quite fast. The Hissatsu is almost violent in its opening with its thick torsion bar but feels unrefined and a bit gritty. The Blur and Leek since they are smaller open fast but the sound is softer but the Blur is much louder than the Leek. The Leek opening sound is more of a soft "snick", the Blur is a pretty standard "click" and the Hissatsu is a "Pow!".
And lastly, my old SOG Flash 2, well, the AO is less than smooth although it opens fast enough I guess, but it just feels and sounds cheap.
I had more AO's in the past but none worthy of note.