PolarStar F2 Conversion Kit V2 M4-M16

PolarStar F2 Conversion Kit V2 M4-M16PolarStar F2 V2 HPA Conversion Kit M4 AEG Gearbox The PolarStar F2 is a highly adaptable HPA engine designed to replace the Version 2 gearbox in M4 AR style AEG rifles. Known for its efficiency, precision, and durability, the F2 offers the performance of a dual solenoid HPA system in a compact, drop in package. High Performance HPA System The dual solenoid design provides independent control over the nozzle and poppet, allowing fine tuned adjustments

PolarStar F2 V2 HPA Conversion Kit – M4 AEG Gearbox

The PolarStar F2 is a highly adaptable HPA engine designed to replace the Version 2 gearbox in M4/AR-style AEG rifles. Known for its efficiency, precision, and durability, the F2 offers the performance of a dual-solenoid HPA system in a compact, drop-in package.

High Performance HPA System

The dual-solenoid design provides independent control over the nozzle and poppet, allowing fine-tuned adjustments to dwell and air efficiency. This makes the F2 versatile across a wide range of configurations, from CQB setups to long-range builds.

Key Features

• Drop-in replacement for Version 2 M4/AR-style AEG gearboxes
• Dual-solenoid design for precise air control
• Adjustable velocity and rate of fire
• Compatible with most M4 AEG platforms
• Operates from 45–145 PSI input pressure
• Compatible with PolarStar FCU and trigger boards
• Lightweight, CNC-machined aluminum construction

Performance Tuning

The F2 is capable of replicating a wide variety of rifle platforms thanks to its adjustable dwell and pressure ranges. Players can dial in performance for close-quarters limits or extend velocity for outdoor fields, all while maintaining excellent air efficiency.

Specifications

• Engine type: Dual-solenoid HPA
• Input pressure: 45–145 PSI
• Operating platform: M4/AR AEGs (Version 2 gearbox)
• Material: CNC-machined aluminum

Note: Requires an HPA tank, regulator, airline, and battery (sold separately).

Required Accessories

To complete your setup, the PolarStar F2 requires several accessories, all available at Badlands:

• HPA air tanks to power your system
• Compatible HPA regulators to control input pressure
• Airsoft HPA lines for connecting tank to rifle
• LiPo batteries with JST connector to power the Fire Control Unit

Frequently Asked Questions

What gearboxes does the F2 V2 fit?

The F2 V2 is designed as a drop-in replacement for Version 2 gearboxes, commonly found in M4/AR-style AEG rifles. It will not fit Version 3 or other gearbox types without modification.

What PSI range does the PolarStar F2 operate at?

The recommended input pressure range is 45–145 PSI. Performance can be tuned within this range to meet field velocity requirements.

What accessories do I need to run the F2?

In addition to the F2 engine, you will need an HPA tank, an air regulator, a line, and a battery to power the Fire Control Unit (FCU). These items are sold separately.

Does the F2 support adjustable velocity?

Yes. The dual-solenoid design allows precise adjustment of velocity and rate of fire by tuning dwell and input pressure. This makes it suitable for both CQB and outdoor field limits.

Is the F2 compatible with standard AEG magazines?

Yes. Since it uses the original AEG gearbox shell, it retains compatibility with most standard AEG magazines for M4/AR-style rifles.