Carbon fiber is what I want because I get a Military discount on two barrels a year. I'm going with the CM because I want the availability of factory ammunition. The CM has tons more factory options than the BR.
The main reason I'm considering the 16.5" barrel is that my suppressor adds around 7" to the barrel, and 23.5" barrel inside the hunting blind sounds a lot less unwieldy than a 29" barrel. I figure there are specialty pistols shooting this cartridge successfully in sub 16" barrels. Plus I read this article and they weren't getting horrible velocity out of a 17" barrel.
6mm CM by the inch.
