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This service include all the the following tasks done in our workshop.
- Drilling a new hole for the new HPA fitting (large diameter for high flow)
- Threading of the new hole
- Installation of the HPA fitting (EU or US version) with sealing product
- Modification of the original GBB magazine base plate (if necessary)
- Cleaning the inside of the magazine
- Seal and working tests
- Price include fitting & work fees, this service cannot be purchased single