CMC BARRELS(TM) AR15 Barrels 7.5", 10.5", and 16.25" .223 WYLDE, 1:7, 41V50, CrMoV designs are the perfect addition to your SBR or Pistol build! You do not want your SBR or Pistol barrel to be too light or too heavy, so the CMC Barrels AR15 Barrel is your solution! CMC's AR15 Barrels are made from 4150 Chrome Moly Vanadium, coated in H&M Blacknitride+(TM) for increased wear resistance, chambered in .223 Wylde so that you can feed it both .223 and 5.56 NATO ammo. CMC incorporated input received from military, law enforcement and civilian shooters into the engineering of their AR15 barrels to accommodate modern-day shooting requirements. Every barrel is Mfg: Cmc Triggers