Previously, you have seen the Alumyx Airsoft Nail Gun that is powered by HPA, and that it means it is tethered to a tank. An option for those who do no want a hose attach is have it gas powered so here is a demo showing it being fired with a green gas adapter... "How many shots you can fire with the green gas adapter fixed on the Pneumatic Nail Gun? Discover it in this short vidéo featuring the pre-production model of the PNG."