Primary Airsoft HPA/M4 Adapter for Hi-Capa

Our 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. The normal operating pressure for green gas is roughly 120 psi depending on the temperature. We recommend that you run you pistol near this pressure and do not exceed 140 psi. Keep in mind that higher pressures can cause excessive wear and damage to the internal components of your airsoft pistol.

I designed this adapter to even the playing field when playing airsoft with a pistol as a primary against AEGs with hi-cap mags. Please watch the installation video on YouTube titled: Primary Airsoft adapter installation tutorial

There are 3 options of this adapter. The only difference between the 3 options is the bb feed tube that is installed into the gas blowback pistol magazine. Each bb feed tube is designed for each specific brand of Hi-Capa magazine. The three options are Tokyo Marui, WE tech / Armorer Works and Novritsch / KJ Works. You will need to install the adapter onto a 5.1 magazine which is the one with the long baseplate. The adapter will not fit onto a WE tech 4.3 magazine which is the one with the short baseplate. The adapter will fit in a 4.3 Hi-capa pistol with a 5.1 magazine because the grip is the same on both 5.1 and 4.3 Hi-Capas.

The metal quick disconnect fitting in the photos will come installed. The fitting is a US standard Foster Pneumatics 1/8 NPT quick disconnect. The fitting can be changed to any fitting that has 1/8 NPT threads. Be sure not to cross thread the fitting when installing a different one. The adapter does not come with a gun, magazine or any other accessories. The included plastic spacer can be used to short stroke your slide if you want to use it.