CNC gearbox HPA V2, QSC

CNC gearbox HPA V2 designed for airsoft replicas AR15 (M4), M16 and other ones with HPA system.

This gearbox is manufactured from one solid block of aircraft aluminum (Dural) EN AW 7075 T651, which has higher strength (590 MPa), than common construction steel (390 MPa). Because of used material, gearboxes have the best durability and resilience than common zinc-aluminum gearboxes. The gearbox is manufactured on precision CNC milling machines, directly in the RetroArms factory.

Package includes: CNC Gearbox HPA V2 – QSC, set of screws

CNC gearbox HPA V2 has protective anodizing, even when it is problematic to anodize aluminum EN AW 7075 T651 (Dural), because of its high strength and hardness.If this material were not anodized, there would be huge risk of corrosion (huge gray spots with rotten look).

CNC gearbox can be installed only in airsoft replicas with Tokyo Marui compatible standard. That means even the inner parts. Do not use rude force during installation. Use only 1 Nm tightening moment on screws, otherwise the screws will overturn in heads. There is no need of tightening screws with rude force, if you want to be sure that screws will sit perfectly, use thread glue or thread color.

Installation of the inner parts and gearbox requires professional knowledge, experience and skills. There are a lot of airsoft manufacturers on the market and every one of them create their own sizes, there are no standards like engineering ISO in airsoft. This is the main problem with a lot of inner and outer parts from different manufacturers which can be same product, but with different dimensions. We recommend using only parts from manufacturers with Tokyo Marui compatible parts, where should not be a problem with compatibility with CNC gearbox.