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This 150% spring is used to increase the force of the hammer to hit the valve pin.
For Tokyo Marui M870 Airsoft
| SKU | WII-4051 |
|---|---|
| Manufacturer / Brand | WII TECH |
| Color | Silver |
| Major Built Material | Piano Steel Wire |
| Size | N/A |
| Disclaimer | Upgrading airsoft guns require necessary skill & technique, manual modification is necessary, consult expertise if needed. |
