PolarStar F2™ Poppet

The F2™ poppet valve is available in two levels — Red and Gold — letting you tune the system for your specific build.

Red – Standard

The Red valve is the standard poppet that ships with the F2™ and provides the maximum amount of airflow through the system. Well suited for builds operating at field velocity limits.

Gold – Low Flow

The optional Gold valve expands the F2's™ tuning capabilities further. Swapping the standard Red poppet for the Low Flow Gold poppet shifts the velocity adjustment window down, letting the system run at a higher pressure while retaining lower velocity. This is especially useful for longer-barreled rifles that need a lower velocity than the F2's™ normal pressure range allows, or to maintain reliable feeding with the heavy spring and heavy BBs without exceeding the velocity limit.

Performance was benchmarked across a range of pressures and BB weights using a 6.05×380mm barrel.