Pay in 4 interest-free payments of $98.75 Learn more
Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
Available in multiple lengths to suit different build requirements
It’s an ideal upgrade for speedsoft and competition builds that demand both form and function
Disclaimer:⚠️ This product is an upgrade part intended for toy use only
Color options may vary depending on availability
Includes spring and O-rings for proper hop-up tension
RetroArms NGRS Spring SiCr with Progressive Winding – M140 SR25 Available in multiple lengths toUpgrade 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