A demo by Airsoft Master of the "Enter & Convert" quick spring feature of the Specna Arms EDGE 2.0 AEG Series... "Sometimes techwork can be hard and espically for changing springs. Which is the main reason why I'm here! Hopefully with the spring change video this can help make it a breeze in changing your spring to be field compliant. If you want a rifle like these then check it out at airsoftmaster.com!"