Cheapest Airsoft M140 Spring Upgrade SRC UP-43
SRC Airsoft M140 Spring Upgrade UP-43
Upgrade or replace your airsoft electric gun spring with this high-quality spring from Star Rainbow Corp (SRC). Fits most TM, CA, & SRC airsoft electric guns. Increases airosft muzzle velocity 430-470 fps depending on barrel length. Requires opening gearbox to upgrade.
Note: Airsoft upgrades will void most AEG Warranties and will increase wear and tear on the gearbox and internal parts. Do all upgrades at your own risk.
We recommend matching this with a higher torque motor and reinforced gearbox. Consult the various Airsoft forums for more information on higher-tension spring upgrades
M140 Upgrade spring Fits most SRC, CA, & TM compatible gearboxes increase speed 430-470 FPS (varies by gun)
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