Metal material, high strength, excellent quality. Adapting to the modification and upgrade of the XWE M4 gearbox, it can stabilize the initial speed and offset the lateral torque. It can be very good to prevent the spring guide of the quick release gearbox from spinning out, and let the spring move when it is compressed and released, releasing a part of the longitudinal twisting force to make the spring more straight. Suitable for people over 14 yeas old.
Colour: Silver Material: Metal Product Weight: 200g
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