The 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 Change) capability when paired with a compatible lower shell. It's ideal for custom builds, techs upgrading a worn-out upper, or players optimizing compression and alignment with RetroArms' modular gearbox system.
Features
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Designed for Version 2 split gearbox setups
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Compatible with 8mm bushings or bearings
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CNC-machined from 7075-T6 aircraft-grade aluminum for maximum strength and minimal weight
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Supports Quick Spring Change (QSC) when paired with RetroArms QSC lower shell
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High-precision manufacturing for improved compression, alignment, and gear performance
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Anodized finish for corrosion resistance and enhanced aesthetics
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Made in Czech Republic by RetroArms — known for elite airsoft engineering
Specifications
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Material: 7075-T6 CNC Aluminum
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Compatibility: V2 AEG gearboxes using split gearbox design
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Bearing Size: 8mm
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Spring System: QSC (requires compatible lower shell)
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Model: 2025
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Brand: RetroArms
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Origin: Made in Czech Republic
What's Included
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1x CNC Upper Split Gearbox V2 8mm QSC (2025)
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Mounting hardware (as provided by manufacturer)
Important Notes
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Lower shell not included — for full functionality, pair with RetroArms QSC-compatible lower gearbox shell
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Installation should be performed by experienced airsoft technicians
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Ensure all internal components are compatible with split gearbox configurations
Disclaimer
⚠️ This product is an upgrade part intended for toys only. Not for real firearms.
