RetroArms CNC Split Gearbox V2 with Integrated Hop Up Chamber ULTRA (8mm) – QSC 4UAD SmartAirsoft 1 × Adapter Set (A/B/C/D

1 × Adapter Set (A/B/C/D for multiple magazine types)

more direct trigger response

and high-torque motor

1x CNC Hop-Up Chamber AR15 BASIC

Precision-engineered for maximum performance

RetroArms CNC Split Gearbox V2 with Integrated Hop Up Chamber ULTRA (8mm) – QSC 4UAD SmartAirsoft 1 × Adapter Set (A/B/C/DThe RetroArms CNC Split Gearbox V2 ULTRA with integrated Hop Up Chamber is the ultimate solution for precision, durability, and ease of maintenance. Crafted from CNC machined aircraft grade aluminum, this split gearbox design allows fast access to internals while ensuring maximum rigidity and alignment. Featuring Quick Spring Change (QSC) and an integrated Hop Up Chamber, this upgrade provides seamless performance and consistency for demanding builds.