Primary Airsoft HPA to X9 Magazine Adapter for Gas Blowback Airsoft Pistols Model HiCapa Straight

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Prices last checked August 20, 2026 across 2 retailers.

Primary Airsoft HPA to X9 Magazine Adapter for Gas Blowback Airsoft Pistols (Model: Hi-Capa / Straight) Features Lightweight glass-reinforced nylon polymer construction with CNC aluminum magazine release Designed to even the playing field when playing Airsoft with a pistol as a primary against AEGs with hi-cap mags. Allows you to use HPA and X9 AEG magazines on your Airsoft pistol Comes pre-equipped with a Foster quick disconnect Includes a longer screw with 2.5mm hex head and new universal feed tube This is a custom designed laser sintered nylon adapter that allows you to use HPA (high pressure air) and X-9 AEG magazines with upgraded springs on your Hi-Capa Airsoft pistol. To use it you will also need an X9 AEG magazine with an upgraded spring, 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. There are 2 versions of this adapter. One for WE Tech / Armorer Works mags and one version for Tokyo Marui mags. 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 with the short baseplate. The adapter will fit into 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 pistols. The TM version adapter is the one with the long bb feed tube that prevents jamming from double stacking. 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 damage threads when installing a different fitting. The adapter

Primary Airsoft HPA to X9 Magazine Adapter for Gas Blowback Airsoft Pistols Model HiCapa Straight price comparison: the lowest price is $85.00 at Evike, the highest is $94.99, and the median across 2 tracked listings is $90.00. Comparing retailers can save up to 11% ($9.99) versus the highest-priced listing.

Compatible with: Hi-Capa, HPA, AEG

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