A previous post is correct. The TP9 is a copy of the Walther P99, including the top-left-side-of-slide decocking "button." Whether Canik pays a licensing fee to Walther is not known to me, but I must imagine so, or Walther Arms LLC would sue to stop importation of this model. If made under license, then it is probably pretty good. Magnum Research, S&W and others have made variants of the P99 with either the Anti-stress action, DAO or "QA" (Quick Action) trigger variations. The DAO is a long heavy pull on each shot while the QA is a short, lighter pull on each shot, similar to a Glock trigger. The Anti-stress action is the one where the first shot can be either long, heavy DA or long, light DA, while follow-up shots are SA. Because of the decocking button on the slide of the TP9, I presume it has the Anti-stress action, although the QA had a smaller decocking button. S&W called its version of the QA action the "L" (as in 990L) and S&W did away with the decocking button to prevent inadvertent decocking, which would require that the slide be racked at least that first 1/4 inch or so to re-set the trigger action. If considerably less expensive than the "real-deal" Walther P99AS model, then it might be ok, but I would rather gamble on the "real deal" as I imagine parts, service and other things would be more of a sure thing.
EDIT: I found the TP9 owner's manual online at Century Arms. Although perhaps not as clearly worded as Walther's owner's manuals, it seems to say the TP9 is available in two versions, one a DA/SA and the other a SA. That would lead me to believe that the TP9 does not use the Anti-stress action of the Walther P99AS, which has three modes of firing. Instead, it seems the TP9 would, in one version, operate as a typical DA/SA with the decocking button, and in the other version, the Quick action version with decocking lever. The manual says both versions have the decocking button. An interesting part of the manual is the part that says the barrel will last a "minimum" of 30,000 rounds. For comparison, the HK P30 barrel went nearly 100,000 rounds with little effect on accuracy and rifling.
