Polarstar UGS CO2 Insert - 12g Milspec

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  • Brand: Polarstar
  • Compatibility: UGS Universal Gas Stock system from PolarStar
  • Construction: Aluminum/Brass


  • Equipped with integral expansion chamber, anti-siphon system, 5 micron filter and check valve to prevent liquid CO2 from entering the regulator regardless of the rifle's or air rig's orientation
  • Also prevents gases from escaping the expansion chamber while switching out cartridges so as to conserve as much CO2 as possible when performing a "combat reload" and allowing several full-power shots even while when the CO2 cartridge has been removed
  • Will average approximately 180 shots based on an F2 running at 1.5J w/ .28g through a 6.05x380mm barrel
  • Standard ASA threads on all inserts allowing use with standard HPA regulators/air rigs
  • UGS requires addition of Milspec Rail (sold separately) before inserts can be used
  • Made to the same diameter as a Milspec buffer tube
  • CO2 Cartridges Not Included