ASG Ultimate Upgrade AEG Spring, Green, M105

ASG's Ultimate AEG Springs offer top-tier performance upgrades to airsoft AEGs. Features: MILSPEC SiCr Steel Springs are the best of the best materials available Progressive coiling offers a smooth and soft start when being put under tension which reduces stresso n the gearbox internals Closed & Grinded ends minimize potential bending of the spring under tension Pre-compressed springs straight from the factory greatly reduce break-in periods of the spring after installation Black zinc plating protects from corrosion Springs with M-Ratings between other common spring brands allowing for much finer tuning of desired FPS Color coding on the springs allow for fast and easy identification to each spring type Blue = M95, Springrate 0.447N/mm Green = M105, Springrate 0.467N/mm Yellow = M115, Springrate 0.519N/mm Orange = M125, Springrate 0.826N/mm Red = M135, Springrate 0.943N/mm