Contact Us Tel:(626) 286-0360 Store Locations
COVID-19 UpdatesPhone Support M-F 9am-5pm PST
Browse by Type or Category
Free shipping for orders over $80. Coupon code: FREESHIP

PolarStar Universal Gas Stock UGS™ CO2 Insert (Type: 33g)

ID: 13512 (ACC-HPA-10000539)
PolarStar Universal Gas Stock UGS™ CO2 Insert (Type: 33g)
Hover or touch above to zoom
CO2 Cartridges not included.
Product image 1 Product image 2


This item is currently Sold Out

MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Free ShippingNo Coupon Required
Free shipping within lower 48 US states, no coupon code needed!


  • For use with UGS or CGS stocks as well as most common HPA regulators/air rigs which are able to accept 900psi
  • All inserts equipped with expansion chamber, anti-siphon system, 5 micron filter and check valve
  • UGS requires addition of Milspec Rail (sold separately) before inserts can be used
  • Standard ASA threads on all inserts allowing use with standard HPA regulators/air rigs
  • Average shot count using an F2™ at 1.5J w/ .28g and 6.05x380mm: 12g = ~180 shots, 33g = ~500 shots
  • 33g models accept threaded CO2 cartridges, while the 12g models use the standard 12g cartridges commonly used for Airsoft and Air Guns
  • Insert cannot be pressurized before installation into stock/regulator

Manufacturer: PolarStar

Size: 12g


Compatibility: For use with the UGS™ Universal Gas Stock system from PolarStar.
Material: Aluminum, Brass

About PolarStar

PolarStar Precision Airsoft was formed in January 2009 to fill a need for high quality, precision manufactured airsoft components designed for performance and longevity.The 2011 release of the patented Fusion Engine HPA system marked a change in direction for PolarStar. The focus shifted from developing upgrade components within the constraints of existing systems to developing innovative HPA systems and accessories which replace the aging AEG technology.PolarStar Airsoft is a division of PolarStar Engineering & Machine (PSE&M), a unique blend of tenured American toolmakers and a full service CAE/CAD/CAM (Computer Aided Engineering, Design, and Manufacturing), special crafts machine shop keeping alive our proud manufacturing heritage of Made in the USA. Founded in 1997, PSE&M began by servicing the automotive racing industry through the design and producing systems and components from art to part. Operating under the auspices of the Delaware Association of Professional Engineers, we retain a Professional Engineer (P.E.) on staff to ensure and certify all design and engineering standards are met. In addition to our own product line, PolarStar also offers engineering and manufacturing services tailored to the airsoft industry.

No Customer Reviews Yet

(Write a review)

There are currently no product reviews.

Questions, Answers and Comments

Discuss about PolarStar Universal Gas Stock UGS™ CO2 Insert (Type: 33g) with your friends and fellow shoppers!

Comment or answer questions for a chance to win awesome prizes. Details can be found on the Facebook page. Remember to check "Also post on Facebook" when commenting to qualify for the giveaways!

Have an urgent question about this item? We monitor these comments daily, but it may be faster to email us directly or call us at (626) 286-0360. Our resident experts are standing by to answer your questions!

California Proposition 65 Warning: Cancer and Reproductive Harm -

This item is currently Sold Out. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.