Ah, you mean this UltraLock
which is not to be confused with the Ultra Lock lock on this Recon 1
which has very little in common with hkyew's Recon 1 shown above.
Name originality is NOT Cold Steel's strong suit!
Anyway...I purchased this UltraLock used at a knife show many years ago, though I had handled them back when they were state-of-the-art. And ahead of their time they were: Zytel handles, pocket clip, one-hand opening, and liner lock--back when those features were still new and not commonly found all on a single knife. The thumb-operated grooves on the base of the blade for opening the knife one-handed (think: activating a cigarette lighter) were not new, but to my knowledge only Tekna had tried them previously on a folding knife. You also see the forerunner of the Ti-Lite's unique leaf-spring liner lock, long before there was a Ti-Lite.
-Steve