Prometheus Non-linear MS120 spring - EMERALD

Prometheus Non-linear MS120 spring - EMERALD

Prometheus' high-quality M120 tuning spring for all electric weapons (not PSG-1). The spring delivers a 0.20g bullet at approximately 120 m/s, approximately 1.4 J. Non-linear wire density improves performance and provides a consistent output power.

Prometheus' new springs are color-coded to make it easier to change springs quickly. Please note that the final power output of a spring depends not only on the spring itself but also on other components, the gun and the bullet used. The best way to get the power you want is to test several different spring options.