One hand opening/flickability quotient?

the kershaw lahar, kershaw junkyard dog 2, crkt M1 lightfoot (black version)


kershaw has a bunch that open like that
 
Check out the ZT 300 kershaws. Assisted open, with a flipper. Things a monster someday i'll pick one up but I can't stand recurves.
 
I've flicked these easily:
Applegate-Fairbairn Covert or Combat folders (both have adjustable pivot);
Spyderco Police model.

Wrist-technique can overcome a tight folder:

I use a double motion. First my hand comes towards me, then it flicks open away from me.
This change in direction produces twice the acceleration, compared to starting from stop.
Picture opening the blade 20-30 degrees before flipping; imagine how easy the blade will then flip open the remaining distance. The timing of the initial swing accomplishes this initial opening.

Wrist strength increases with practice
 
Almost any knife with a stud or hole can be opened with the above technique. Sometimes I also turn my wrist a bit with the away flick
 
This Benchmade 630 is at least 50 dollars more than you said, but I've handled a lot of knives and it's way fast with just a slight flick, plus it's blade is huge and lockup solid.
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- Benchmade Axis-lock (griptilian...)
- Cold steel voyager serie, gunsite & Ti-lite. The ti-lite can be open like an auto with the thumb or with his flipper or with his wave feature
- what about another CRKT, try the m21 special forces !!!
 
The CRKT M-16 flipper works very well with a little attention to the pivot pin tension. The more expensive models seem to work more smoothly and consistently but considerable enthusiasm is needed on the larger models unless pivot tension is very loose.

Emerson with 'Wave' will open on pocket draw - as will the CS Ti-Lite although the latter has a habit of ripping pockets if you're not careful.

I've handled Kershaw & CS non-assist models that will 'flick' open with practice without having to loosen pivot tension. While loosening the pivot tension can convert lots of folders into 'flick' knives, you risk blade wobble, pocket carry safety and lockup safety.
 
I definately would not use this method everytime you open the knife. You could end up with a flattened stop pin that would allow the blade to have vertical play and could make the lock unsafe.....depending on lock type. Opening it this way every now and again probably would not hurt it, but some of that would depend on whether CRK&T heat treats their stop pins or not. Of course I am assumming that you are talking about opening the knife with significant force and getting a loud "THWACK" from it. I like a very tight pivot myself and I like for my blade to sorta fall into lockup with a little "snick". :D
 
Kershaw JYD2 or a Spyderco Military. Actually the Spyderco Compression lock, as found on the ATR, Yojimbo, Superhawk, Para Mil, etc, can be very fast with some practice. Compress the lock slight wrist flick and it opens blink fast.
 
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