Novritsch SSR4 FPS Adjuster Ring – R138

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.