ASG Ultimate Upgrade Spring AEG

The ASG Ultimate Upgrade Spring fits in all AEGs.  Comes in a variety of spring powers for different FPS goals. M95, M105, M115, M125, and M135 spring powers. Spring are pre-tuned to keep their original tension without compressing as much over time.  The M105 and M115 are the most popular choices. Ultimate Mil-Spec AEG springs are manufactured out of the best steel (SiCr) available for springs. With minimum loss in power and consistency, the Mil-Spec spring series is the ULTIMATE choice for your AEG. The Mil-Spec springs are color coded for better identifying them when switching out the spring for different upgrades.  The springs are designed from the start to deliver the best output while keeping it's coil strength, consistency and quality. With the closed and smooth ends, the spring remains in place during use to prevent reduction in ROF due to bending. Available in M95, M105, M115, M125, and M135 - see drop down menu for options.