They sell the carbons as upgrades for an outrageous price and only a 7g savings in weight each. They are flexy trust me. I have them both and the strong satin metal feel of the stock martas is much better than the flexy carbon versions.
i see you're running a blur. I have the sl's on my blur xc. loved the weight, however now that I have the regular martas on my nitrous. Oh boy, the lever feel is so much nicer. I think if the lever was like the hope mono mini pros which is much stiffer, I would have liked them a lot more.