Huben Gk1 Main Valve Rebuild
How to rebuild the main valve and replace all the seals for the main valve system on the Huben GK1 The parts can be found here: https://gogun.co/products/huben-gk1-m... The tools can be found here: Valve Seat removal toolset - https://gogun.co/products/gk1-valve-s... o-ring setter - [available soon]
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Huben GK1 .30 cal: Airgun Ammo Showdown | Testing what Slugs/Pellets are best power for Home Defense
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Making barrel rifling using steel tubes
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