Polar Star UGS Regulator Stock and 13ci HPA Tank

With the PolarStar UGS (Universal Gas Stock) you can now get the performance advantage of a HPA system without needing to be tethered to a remote air rig and still retain the likeness and function of a traditional adjustable AR-15 stock. It can be used with any of the PolarStar cylinder conversion kits such as the F2™, F1™, JACK™ or Kythera™ and is compact enough that it can also be used with other similar HPA cylinder systems on the market.