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Foster Male QD Plug (1/8th NPT)

Looking to tap your green gas airsoft gun for HPA? This is the fitting you need! While there are other fittings out there that are perfectly capable this is the same style Polarstar originally used and now is almost standard in the airsoft industry for HPA.

You don't have to worry about compatibility with this or that regulator. Any regulator made for airsoft (such as the Redline Firebase/SFR) will work with this fitting.