Pay in 4 interest-free payments of $98.75 Learn more
Ships within 48 hours · Estimated delivery Jul 26 - Jul 31
Compatible with ICS M4 AEG rifles with split gearbox
It’s an ideal upgrade for speedsoft and competition builds that demand both form and function
Color options may vary depending on availability
Available in multiple lengths to suit different build requirements
RetroArms NGRS Spring SiCr with Progressive Winding – M140 SR25 Compatible with ICS M4 AEGUpgrade your Tokyo Marui NGRS gearbox with the RetroArms M140 Spring, crafted from high grade SiCr (Silicon Chrome) alloy and engineered with progressive winding for smoother compression and reduced mechanical stress. Designed for builds requiring higher muzzle velocity and consistent spring tension. Features: Made from durable SiCr (Silicon Chrome) spring steel Progressive winding reduces wear and enhances durability Designed specifically for NGRS
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