Primary Airsoft Gen. 4 Hi Capa M4 HPA Adapter (TM Magazine)
Installation Tutorial: https://youtu.be/AydmykdSGSM
4th generation Hi-Capa M4 adapter is injection molded from a strong glass reinforced nylon material. This adapter allows you to use HPA (high pressure air) and M4 AEG magazines on your Hi-Capa airsoft pistol. To use it you will also need an M4 AEG magazine, “paintball” tank with low pressure regulator (0-140 psi), a hose with a Foster (polarstar) quick disconnect and of course bbs.