I think he said he does not want a PRICEY carbon fiber tube.
I would lump the PRI into the "PRICEY" category.
Good stuff for sure, but not everyone NEEDS a tube that good.
For a cheaper carbon fiber tube, look at DPMS and Briley.
I have crappy small pics here:
www.ar15barrels.com/parts.shtmlNot sure where fiberform's fall in price, but they may be good choice too.
Beware that these are 1 piece units so you need either a strap wrench or a DPMS wrench that reaches around the reciever.
Also beware that DPMS's wrench will not work with a typical clambshell type vise block without serious modification to the block.
Ask me how I know.
Lastly, because they are 1 piece construction, you can't hide alow profile gas block under one.
The gas block HAS to be out front, no other way to install it and the gas tube.
Just something to consider.