HPA Conversion kit F2™ V2 for M4/M16 - PolarStar

PolarStar F2™ V2 HPA Conversion Kit for M4/M16 allows you to convert V2 gearbox airsoft rifles (such as M4, AR15, ARP or SCAR-L) into a modern HPA-powered system with excellent efficiency and stable performance. Compared to traditional systems, it features a more compact design while maintaining full functionality and extensive adjustment options.

At its core is a dual-solenoid control system that independently manages the nozzle and valve operation. This enables fine-tuning of BB feeding and air volume, resulting in improved shot consistency and optimized performance for different setups. The spring-loaded nozzle enhances reliable feeding across a wide pressure range.

The system supports both closed-bolt and open-bolt operation modes and offers a wide adjustable power range. Its aluminum construction ensures durability while keeping weight low. Compatibility with various nozzle lengths allows easy adaptation to different replica platforms.

The robust construction of the F2™ allows for operating pressures ranging from 45psi to 145psi, enabling speeds from CQB to DMR using a single nozzle for the entire speed adjustment range.

Spring-loaded nozzle: The F2™ nozzle is pre-tensioned forward by a spring, ensuring consistent loading regardless of operating pressure. Can accommodate, like the Fusion Engine™ spring, both light and heavy springs, which are available for setting the load force.

Easily adjustable FPS can be used for both CQB and field use without changing nozzles

The F2 FCU is essentially a Mini Fusion Engine. Offers the same adjustability and performance as the Fusion Engine, but in a cylinder-sized package.

Patented dual solenoid design: The F2™ dual solenoid design provides the same functionality as the legendary Fusion Engine™, but in a more compact, efficient, and flexible design. Two solenoids allow independent regulation of the nozzle and poppet valve to achieve unparalleled control over both the charging time and the volume of air used. In addition, the firing sequence can be changed to work with both closed bolt and "AEG" mode.

Increased efficiency: The F2™ features a new one-piece, lightweight valve construction that functions identically to the Fusion Engine™. This valve is capable of operating at lower pressures and uses less air to function, optimizing air efficiency.

A simple poppet valve can operate at lower pressures

Spring-loaded nozzle provides consistent loading

The F2 FCU with LCD allows for easy adjustment.

Extremely lightweight and compact design

The dual solenoid design allows for the change from open to closed bolt firing.

Features:

• HPA system for V2 gearbox
• compatible with M4, M16, AR15, ARP, SCAR-L and similar platforms
• dual-solenoid control system
• independent adjustment of nozzle and valve
• spring-loaded nozzle for reliable feeding
• supports closed-bolt and open-bolt modes
• velocity range: approx. 60–150 m/s
• operating pressure: 45–145 PSI
• compact and lightweight design
• material: aluminum alloy
• compatible with multiple nozzle lengths
• power supply: 3.7V battery (JST connector, not included)
• color: red
• manufacturer: PolarStar