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PolarStar UGS Universal Gas Stock Combo Kit | HPA Air Stock
PolarStar UGS Universal Gas Stock Combo Kit | HPA Air Stock 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. I...
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