gearbox and parts



-- For M4/MP5/G3 series-- High intensity, high precision, can draw M90-M150 spring-- Compatiable for..
-- Material: zinc alloy-- Feature: Quick release spring and spring guide for easy power adjustment /..
-- Material: zinc alloy-- Feature: Quick release spring and spring guide for easy power adjustment /..
-- Material: zinc alloy-- Feature: Quick release spring and spring guide for easy power adjustment /..
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