C5 Gas System


Black Hole Weaponry introduces the newest revolution in specialized gas systems with the C5 (Caudle 5) gas system for 300 Blackout & 7.62×39 calibers. This custom gas system, available exclusively through Columbia River Arms falls between Pistol and Carbine gas systems

Click Here To Configure Your 300 Blackout Barrel
Click Here To Configure Your 7.62×39 Barrel


  • Eliminates gas tube fires from unburnt powder accumulation in the gas tube

  • Helps eliminate the need for specialized buffer weights & springs to “tune” cycling

  • Allows both  super and sub-sonic ammunition transition without having to swapping components

  • Seamless operation from 9.5”-18”

  • Comes with gas tube

  • Uses a common a gas block