Only 4 left in stock
High-quality, durable, and easy-to-install spring for PolarStar Fusion Engine and F2 HPA systems. Provides lighter spring force for improved performance and accuracy at lower PSI.
The PolarStar Light Poppet Spring is a direct replacement for the stock spring in the Fusion Engine and F2 systems. You can easily install it in a few minutes with basic tools.
The spring is also compatible with a variety of other PolarStar HPA systems, including the JACK and Kythera.