AW Custom HPA/M4 Magazine Adapter for Hi-Capa (Includes Feeding Magazine)

Running a Hi-Capa on HPA solves the gas problem — no more dropping in cold weather, no more running out of green gas mid-game, no more pistol mags that need 30 seconds in a warm pocket to perform consistently. The AW Custom kit goes a step further: it lets you feed your HPA Hi-Capa from standard M4 AEG magazines, which means you can carry a single magazine type across your primary M4 rifle and your secondary HPA Hi-Capa.

The mechanism is simple. The adapter replaces the standard Hi-Capa magwell with a unit that accepts M4 mags. The included feeding magazine is a short Hi-Capa-shape sleeve that carries BBs from the M4 mag up into the Hi-Capa's hop-up via spring tension. HPA pressure is supplied from a standard HPA line through the adapter, controlling the firing cycle. The result is a pistol that feels and fires like a Hi-Capa but reloads from belt-mounted M4 mags.

Compatibility is broad. The Hi-Capa side fits TM/SSP/WE/Vorsk-spec frames (the most common Hi-Capa AEG/GBB families). The M4 side accepts any Tokyo Marui-spec AEG magazine, which is most things — mid-caps, hi-caps, EMM-style mags, drum mags. Combined with your existing HPA tank and regulator, this gives you a high-capacity, weather-immune secondary that costs a fraction of a dedicated SMG.

The kit ships with the adapter unit, the feeding magazine, and the air-line fittings. You'll need an HPA tank, regulator, and a line separately if you don't already have an HPA setup.

Specifications