Novritsch SSR4 FPS Adjuster Ring

Novritsch SSR4 FPS Adjuster Ring Increase the fps/Power of your Rifle Exactly to the Legal Limit of your Field with the fps Adjuster Rings You can put them on the spring guide to adjust the muzzle velocity of your SSR4 These rings are designed to be placed on the spring guide and each ring will increase by 0.15 Joule or about 125 FPS of muzzle velocity Please note that you are advised not to use these rings when your SSR4 has a power output of above 1.5 Joules or about 400 FPS and do not stack more than 2 rings into the SSR4 Suitable For Novritsch SSR4 Series Electric Rifle Airsoft Guns