RetroArms CNC Gearbox HPA V2

RetroArms CNC HPA V2 gearbox
This expert product description was prepared by the ANAREUS.cz expert team. All rights to this unique content are bound to the anareus.cz domain.RetroArms CNC HPA V2 gearbox is a specialised shell designed from the ground up for HPA airsoft guns using the V2 gearbox design. Unlike a universal or modified AEG shell, it does not feature unnecessary gear bearing holes or space for the main spring guide. The result is a cleaner construction optimised for HPA engine installation while also offering a lower weight than the RetroArms AEG gearbox version. The foundation is a high-strength aerospace-grade EN AW 7075 T651 aluminium alloy, precision CNC-machined for accurate dimensions. The current 2025 version features a redesigned HPA engine mounting system and revised cable routing, making it easier to build a modern HPA setup. The shell provides a suitable foundation for compatible systems such as PolarStar F2, Mancraft and other HPA engines designed for the V2 platform. This model is designed exclusively for HPA and is not intended for building a conventional AEG gearbox.
Key features of the RetroArms CNC HPA V2 gearbox

Designed specifically for HPA
A specialised shell for HPA engines in the V2 configuration, without structural elements required only for a conventional electric gearbox.

Aerospace-grade EN AW 7075 T651 aluminium alloy
The shell is precision CNC-machined from high-strength EN AW 7075 T651 aluminium alloy, providing excellent strength while maintaining a low weight.

Improved 2025 version
The current version features a redesigned HPA engine mounting system and cable routing for a cleaner and more practical HPA system installation.

Lower weight than the AEG version
Removing structural elements required only for AEG systems made it possible to create a lighter shell optimised for HPA.

For V2-platform HPA engines
A suitable foundation for compatible HPA systems such as PolarStar F2, Mancraft and other units designed for the V2 gearbox platform.

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