The RetroArms CNC Split Gearbox SR25 (8mm) – QSC is a premium, high-strength gearbox shell engineered specifically for SR25 / long-type AEG platforms. Featuring a split gearbox design, this system allows easier maintenance, faster spring access, and improved internal alignment—ideal for advanced DMR and high-power builds.
Precision CNC-machined from durable aluminum alloy, this gearbox offers exceptional rigidity and durability under heavy load. Combined with the Quick Spring Change (QSC) system, it enables rapid spring tuning without full disassembly, making it a top-tier choice for serious airsoft technicians and performance builders.
Features
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CNC-machined aluminum construction for maximum strength and precision
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Designed for SR25 / extended gearbox platforms
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Split gearbox design for easier maintenance and assembly
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Quick Spring Change (QSC) system for fast tuning
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Compatible with 8mm bearings or bushings
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Reinforced structure for high-torque and DMR builds
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Optimized internal alignment for smooth and reliable performance
Specifications
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Material: CNC Aluminum Alloy
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Compatibility: SR25 / long-type AEG platforms
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Bearing/Bushing Size: 8mm
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Design: Split gearbox
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Spring Change System: QSC (Quick Spring Change)
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Brand: RetroArms
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Origin: Made in Czech Republic
What's Included
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1x RetroArms CNC Split Gearbox SR25 (8mm) – QSC
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QSC spring guide and mounting hardware (as provided by manufacturer)
Important Notes
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Not compatible with standard V2 or V3 gearboxes.
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Professional installation is highly recommended.
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Ensure compatibility with SR25-specific internal components (piston, cylinder, nozzle, etc.).
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Some fitting may be required depending on receiver brand.
Disclaimer
⚠️ This product is an upgrade part intended for toys only. Not for real firearms.
