PolarStar Jack V3 AK HPA Engine

The PolarStar JACK™ HPA conversion kit, known as "Simple Jack," is a cost-effective yet high-performance solution for upgrading AEGs with a pneumatic system. Designed to replace traditional gearbox components, JACK™ delivers enhanced reliability and performance by utilizing a single moving part—its nozzle, which acts as its own poppet valve. This innovative design allows for superior air flow and firing consistency compared to solenoid-only systems.

JACK™ offers impressive adjustability, allowing users to fine-tune velocity from below 280 FPS up to 500 FPS with .20g BBs, depending on barrel length and input pressure. With a maximum rate of fire of 30 rounds per second and exceptional air efficiency—achieving over 1,000 shots from a 13/3000 tank at 1.5J—it’s perfect for those seeking an advanced, economical HPA setup for their airsoft gun.

Features:

• High-performance HPA conversion for AEGs
• Universal compatibility with center-line nozzle gearbox versions
• Programmable pneumatic system replaces traditional gearbox components
• Single moving part nozzle acts as its own poppet valve for superior air flow
• Adjustable velocity up to 500 FPS with .20g BBs
• Maximum rate of fire of 30 rounds per second
• Efficient air usage with over 1,000 shots from a 13/3000 tank at 1.5J with .28g BBs