PolarStar JACK HPA Conversion Kit – VFC HK417
£348.00
Polarstar JACK HPA conversion kit for the VFC 417 platform — Polarstar’s precision FCU-based HPA engine in a platform-specific drop-in build. Consistent, programmable, and a transformative upgrade for a premium platform.
PolarStar JACK HPA Conversion Kit — VFC 417 Platform
The Polarstar JACK is a complete FCU-integrated HPA conversion engine — one of the most capable drop-in HPA systems available. This version is engineered specifically for the VFC 417 battle rifle platform, delivering Polarstar’s class-leading consistency and programmability to one of the premium AEG platforms on the market.
Polarstar JACK — Core Features
- Platform-specific engineering — designed to fit the VFC 417 mechbox geometry without permanent modification
- Integrated FCU — electronic fire control with semi, full auto, and burst modes
- Polarstar FPS consistency — one of the tightest shot-to-shot FPS windows of any HPA system
- Lightweight and space-efficient — the JACK’s compact design suits the 417’s receiver layout
- Programmable dwell and ROF — tune the system without disassembly
The VFC 417 + Polarstar Combination
The VFC 417 is already a well-regarded platform for its external quality and DMR potential. Adding Polarstar JACK HPA conversion takes the internal performance to a level the stock AEG system cannot match — delivering the shot-to-shot consistency that the 417’s mid-range role demands.
If you’ve invested in the VFC 417 platform and want to extract maximum performance from it, the JACK conversion is the most impactful upgrade available.
External HPA rig required. Designed for VFC 417 platform. Professional installation recommended. 18+.
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