Pay in 4 interest-free payments of $98.75 Learn more
Ships within 48 hours · Estimated delivery Aug 7 - Aug 12
CNC-machined steel construction for high strength and wear resistance
Color options may vary depending on availability
Available in multiple lengths to suit different build requirements
Includes spring and O-rings for proper hop-up tension
Highly polished inner surface for reduced friction and smoother piston operation
RetroArms NGRS Spring SiCr with Progressive Winding – M140 SR25 CNC-machined steel construction for highUpgrade 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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