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- 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
- Insert cannot be pressurized before installation into stock/regulator
