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Full CNC-machined metal teeth for maximum strength and precise gear engagement
Optimized internal space for motor fitment
Compatibility: M4 AEG/HPA builds (verify fit before purchase)
Supports green tracer BBs
Some fitting may be necessary depending on receiver tolerances
RetroArms CNC Gearbox M4/416 TM NGRS (8mm) Gel Blaster Full CNC-machined metal teeth forThe RetroArms CNC Gearbox M4 416 TM NGRS (8mm) is a premium CNC machined gearbox shell designed specifically for Tokyo Marui Next Gen Recoil Shock (NGRS) M4 and HK416 platforms. Built from high strength aluminum alloy and engineered with extreme precision, this gearbox provides unmatched durability, perfect gear alignment, and enhanced performance for high end custom builds. Ideal for advanced technicians and performance focused builds, this gearbox
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