r/canadaguns • u/IGnuGnat • May 03 '26

Fix my gun Something different: Making barrel rifling using water (and copper and 3D printed jig and electro etching)

https://www.youtube.com/watch?v=bypXVjkbvIo
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u/Pelcat May 04 '26

This is indeed how JStark's plans for the FGC-9 went about engraving rifling into the piston casing used for the barrel. Electro-chemical machining/engraving has been used to rifle barrels on a large scale since the 80s. It is especially efficient for auto-cannons and artillery, I believe that's how they rifle the Bushmaster 25mm cannon barrels.