Fox Green shows how you can have your AEG converted to use HPA as power source... "In this video I show you how I converted my Airsoft Replica from an AEG to HPA. I also show you how to tune the FPS, Dwell, Rate of Fire and Programme Burst mode and more.

This video is finished off with an awesome gameplay using my newly converted Airsoft replica."

Destockage Games has released a comprehensive video tutorial detailing the conversion of three distinct airsoft replica types—AEG, GBB, and pump-action to High-Pressure Air (HPA) systems. Beginning with an introduction to the advantages and types of HPA systems, the video offers step-by-step instructions for each conversion, including gearbox disassembly and HPA installation for AEGs (along with MOSFET considerations), magazine adapter installation for GBBs, and valve replacement for pump-action shotguns.

Frog Engineering show the conversion they did and that they put out a manual to help you out... "Japanese frog also do GBBR!!! Now they can, on HPA! Next week, an assembly manual will be published in the usual manner, with replacement parts and guides for conversion assembly."