SiJun SJ M4 Gearbox

Upgrade your sijun m4  CQB blowback gel blaster with this high-performance OEM gearbox, featuring a durable nylon shell and precision metal gears for superior reliability. Designed as a direct replacement, this complete assembly delivers smooth operation and comes Tamiya-plug ready for easy installation.

Key Features:

⚙️ Metal Gearset - Handles rapid firing without stripping
🛡️ Reinforced Nylon Housing - Withstands intense CQB gameplay
🔌 Tamiya Connector - Plug-and-play compatibility
🔫 Blowback-Ready - Maintains original recoil function

Technical Specifications:

• Brand: SiJun (Factory Original)
• Construction: Nylon shell + metal internals
• Color: Tactical black
• Connector: Standard Tamiya plug

Package Includes:

📦 1x Complete M4 CQB Gearbox Assembly

Why Choose OEM?
✔ Restores factory performance
✔ Metal-on-nylon reduces wear
✔ Perfect fit for blowback models
✔ Hassle-free installation