I looked and I found no record of them being mentioned on this forum. Which is fine. Check this out.... Christensen Arms makes high-end carbon fiber barrelled rifles that weigh a fraction of that of standard metal manufacture. http://www.christensenarms.com/carbon-vs-steel I went to a show and they were there in attendence. I held a 20" barreled 308 AR that weighed..... 7.0 lbs!!! Description The CA-10 Recon delivers a new level of long range precision rapid fire. The CA-10 has been meticulously setup for the tactical and hunting environment in order to make every shot deadly accurate. Introductory calibers will be the .243 Win, 6.5 Creedmoor, .308 Win, and the .338 Federal. Whether you are hunting big game on the run or shooting accuracy in competition matches, this platform will prove lighter, stronger, faster, and more accurate than you thought possible. Patented Carbon Barrel Select Match Grade Barrel Liner Patented Carbon Handguard Proprietary Piston Drive Nickel Boron Coated 7075-T6 Aluminum Billet Upper Nickel Boron Coated 7075-T6 Aluminum Forged Lower 20 Minute Picatinney Rail Adjustable Custom Trigger Houge Over Molded Grip Laser Engraved Titanium Bird Cage Flash Suppressor