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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
it features a full rack of 19 CNC-machined steel teeth designed to handle higher stress
Available in multiple lengths to suit different build requirements
Includes spring and O-rings for proper hop-up tension
Compatible with ICS M4 AEG rifles with split gearbox
RetroArms NGRS Spring SiCr with Progressive Winding – M140 SR25 it features a full rackUpgrade 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