Action Army HPA Adaptor for KWA/KSC

Running a gas blowback off HPA solves the two things gas does worst: cold performance and consistency. The magazine stops being a gas reservoir and becomes a feed point, and the pressure comes from a regulator you control instead of from the weather.

Action Army describe this as a plug and play adaptor for most gas blowback magazines, fitted by simply replacing the fill valve. There is no machining and no permanent modification — the original valve goes back in whenever you want the magazine back as it was.

This is the US thread version for KWA and KSC magazines.

Specifications

Good to know before you buy

The adaptor is not the system. You still need a regulator, a line and an air source, and the regulator is where your safety and your consistency come from.

Check your thread before ordering. This is the US type. Magazine fill valve threads are not universal and the wrong one will not seat.

Reversible. Refitting the original fill valve puts the magazine back to standard, which matters if you ever sell it on.

Set the regulator before connecting, not after. Pressure that has not been checked is the one thing on an HPA setup that genuinely bites.

Frequently asked questions

Does this come with a line?
No, the adaptor only. Line, regulator and bottle are separate.

Will it fit any gas magazine?
Action Army describe it as suitable for most gas blowback magazines, and this version is the KWA and KSC US thread one. Check yours first.

Is the modification permanent?
No. It replaces the fill valve and the original can go back in.

What pressure should I run?
That depends entirely on the gun and the spring behind it, which is what the regulator is for. We can talk it through if you tell us the setup.

Will HPA damage my pistol?
Not if it is regulated sensibly. Unregulated pressure is what damages things.