This problem is reported in Corsair Forum by many users. I also have an older K70 without RGB. There, the problem also occurs, but not as extreme. I have the Corsair Forum reported about 1 year ago. Apparently in vain. I will pursue the issue in the Forum on. Should Corsair fix the problem, I'll note it here in the review.
Incidentally, I am not talking about the natural Click on MX Brown switches. The clink, of which I speak, also occurs in the K70 with MX Red. This clanking coming from the way in which the buttons are mounted on the metal surface and is rather due to the (lack of) Product Design Corsair keyboards. At least one other reviewer also reported about. Clicking my review as unhelpful, is not it :) save them from this problem I've tested several copies of K70 with MX and MX Red Brown and each copy has this problem.
Some will not disturb the possibly, but I'm at 200 just a little sensitive when it comes to the quality of a keyboard. Because the keyboard otherwise perfect, if a little expensive, there are at least 3 stars.