Skeleton Air Regulator Wave Spring Kit - EMEK / ETHA / CS1 / CS2 / GEO / GTEK

This is a great product. Allows you to be able to setup marker 300fps or close to it without having to under bore paint or turn screw all the out. Even that doesn't work sometimes. So glad these are back in stock.

Springs work so well!

The spring works great! I have 3 Geo4s and I have this spring in all 3 of them. Smooth clean shot!