What is the difference in diameter between the UGS and CGS inserts?
PolarStar CO2 Inserts for UGS and CGS Gas Stock
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Open Mar 28, 2026 - 07:26 AM
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Answer
Mar 28, 2026 - 07:26 AM
The only difference is the diameter of the tube: CGS inserts are narrower to fit inside a CGS's Milspec buffer tube, while UGS inserts match the diameter of a standard Milspec buffer tube. This ensures each insert fits perfectly within its intended stock, optimizing stability and compatibility.
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PolarStar CO2 Inserts for UGS and CGS Gas Stock
The PolarStar CO2 inserts are manufactured for both the UGS and CGS stocks and have models for both the 12g and 33g disposable CO2 cartridges in either variant. However, the inserts have more uses than just being paired with one of these stocks. Since they are equipped with the same standard ASA thr...
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