Arcturus Standard Spec Version 3 Gearbox Shell (8mm Bearings) AEG Gearbox Upgrades as higher pressure may cause

as higher pressure may cause excessive wear or damage to the airsoft gun internals

This will allow you to install AR15/M4  tube with stock

Aluminum handguard

5 hours from low battery

just like in a real gun

Arcturus Standard Spec Version 3 Gearbox Shell (8mm Bearings) AEG Gearbox Upgrades as higher pressure may causeFeatures Complete standard version 3 gearbox shell Includes 8mm bearings Stripped design comes ready to install your preferred internal parts Factory direct OEM replacement part Drop in design requires little to no modifications to fit Manufacturer: Arcturus Specifications: Bearing Diameter: 8mm Compatibility: For Arcturus AK series and other similar AK series airsoft AEGs