SSR4 FPS Adjuster Ring
Increase the fps/power of your SSR4 exactly to the legal limit of your field with these fps adjuster rings.
You can put them on the spring guide to adjust the muzzle velocity of your SSR4. The package comes with 2 rings. 1 FPS adjuster ring will increase the power by 0.15J, on average, and you can stack a maximum of 2 rings.
ONLY use together with original SSR4 Springs.
Do not use any adjuster rings if the power is already at or above 1.5J.