More on the "airsoft sniper" series by the Red Army Airsoft Club and for this video, Alexander reviews the Redline Airsoft AirStock. For those who want to use HPA to power their airsoft guns by are turned-off by the use of a hose to tether to an external tank, the AirStock solves the problem by allowing you to mount an air tank directly to your airsoft gun. This video also includes how to install the kit.