Answer
Jun 21, 2026 - 09:05 AM
The main difference between the F2, F1, and JACK systems is in their internal design and control. Both F1 and JACK are "open bolt" systems, meaning the nozzle is rearward at idle and fires during its forward movement. The F2, which is featured in this airsoft m4 hpa conversion kit, uses a dual-solenoid system. This dual-solenoid setup gives you complete control over the shot cycle, allowing for independent adjustment of both loading and firing. This results in more precise tuning and enhanced performance, making the F2 ideal for advanced users who want maximum customization.
