This service include all the the following tasks done in our workshop.
- Unmount of the original GBB magazine
- milling of the end DRUM connector thread, in order to get the fitting deep screwed and prevent any break.
- Rethreading with M6 tap
- Installation of the HPA fitting EU or US version with sealing component
- clean the inside of the magazine tank and re-mount the magazine.
- Firing tests (around 40 BBs) to check about the working and seal