CNC Duralumin Gearbox V2 QSC (8mm)

Package Contents

• CNC Gearbox V2 QSC
• Screw set
• QSC Spring Guide

Warnings

• Do not use cylinder heads with rubber bumpers (MAXX, FPS). This can permanently damage cylinder head mounting points, which is not covered under warranty. The rubber bumper can be removed, and washers can be used instead.
• The gearbox is optimized for JeffTron Leviathan and Scylla MOSFET units. Units from other manufacturers (e.g., PERUN) may require minor adjustments for proper fitting.
• When tightening screws, use a maximum torque of 1.2 Nm (medium-strength thread locker recommended).
• The gearbox has slightly smaller bearing holes (by 0.02 mm) to prevent bearing rotation after installation. Chamfered edges simplify installation. While designed for RetroArms ANTIROT bearings, standard round bearings can be used but should be glued (ensure adhesive does not contact the bearing surface).
• Proper alignment of the gearbox within the receiver is crucial to ensure a straight axis between the chamber, nozzle, and gearbox. This requires advanced technical skills. Installing a CNC gearbox correctly involves expertise in gear shimming, motor gear engagement, AOE tuning, tappet plate movement, cylinder head positioning, securing the spring guide, proper MOSFET installation, and fine-tuning the entire assembly within the replica body. Selecting the correct nozzle length, hop-up bucking, and chamber fitment is also e..