Originally Posted by Time To Shine
well I'm asking what is it for? What pressure do you need to test? I have never seen or heard about that for any other gun.
and so if i have a hp tank (crossfire 45/4500) i cant use that on a G6R?
You measure the pressure of the LPR (Low pressure regulator) and the HPR (High pressure regulator). The little thing below the barrel and your foregrip. Not many gun manufacturers have pressure testers. It helps to tune your gun so that you can get the max efficiency or smoothest shooting settings. Depending on how you want it tuned.
As far as the tank; If it's a low pressure system, then no, you need a lp or slp tank.