BattleMonkeys Airsoft shows how to HPA Tap Gas Magazines using CQB Russian's Valve. This then allows you to use HPA to power your gas airsoft gun... "This video shows how to use the HPA CQB Russian valve for WE mags. For those who want to know how to safely tap their green gas guns this is the video for you."

Putting an HPA engine into an support airsoft gun can be a good option if you want fewer moving parts and not bothered by having a line tethered to an outside HPA tank. In this video, BattleMonkeys Airsoft shows how to install the PolarStar Jack HPA Engine into an A&K M249.

You can click here to know the parts list that you need to the HPA conversion.