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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1
Constructed from CNC-machined aluminum and finished with a sleek black anodized coating
Reinforced shell for high-torque and high-speed builds
With an adjustable length range of 22mm to 25mm
and consistent performance
RetroArms CNC Upper Split Gearbox V2 8mm QSC (2025) Cylinder Heads Constructed from CNC-machined aluminum andThe RetroArms CNC Upper Split Gearbox V2 8mm QSC (2025) is a high performance upper gearbox shell designed for Version 2 AEG split gearbox platforms. Crafted from aircraft grade 7075 T6 aluminum using precision CNC machining, this component offers exceptional strength, tight tolerances, and lightweight construction built to handle high stress, high RPS setups. This upper shell features 8mm bushing bearing compatibility and integrates QSC (Quick Spring