PDI Power Adjuster Rings AEG

With the PDI Power Adjuster Rings AEG, you can adjust the Joule/FPS value tighter than the spring you installed gives.

With these rings, you can adjust your Joule/FPS value slightly upwards in a fairly simple way to just about reach the limit. You do this by placing these rings around the Spring Guide, putting more pressure on the spring and thereby increasing your Joule/FPS value.