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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15
Includes spring and O-rings for proper hop-up tension
even layer to gear teeth—do not over-grease
Spring Rating: M140
Disclaimer:⚠️ This product is an upgrade part intended for toy use only
RetroArms NGRS Spring SiCr with Progressive Winding – M140 SR25 Includes spring and O-rings forUpgrade 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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