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Post here if you have general questions concerning GunCAD, printing, or otherwise fabricating DIY firearms. Newbies are welcome, but users are encouraged to read Ctrl+PEW's Getting Started Guide if they haven't already.

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I want advice or help (self.help)

submitted 2 months ago by alswidi to c/help

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I am trying to make a barrel for FCG-9 But I use a stainless steel rod . Do you have any advice?

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[–] Kopsis 3 points 2 months ago (1 children)

My advice is set aside the steel rod and get the 40cr or 42cr hydraulic tubing listed in the ECM Tutorial document (16mm OD, 8.0 - 8.6mm ID). Then follow the tutorial. Yes, it's more expensive than stainless steel rod. That's because it's actually designed to contain the kind of pressure a 9mm cartridge will produce. The 40cr and 42cr steel is significantly stronger and harder than your stainless steel rod (which is probably 304 or 316 alloy).

I can't emphasize this enough -- taking shortcuts when making a 9mm barrel puts you at high risk of serious injury or even death. If you can't do it right due to cost or material availability, don't do it.

[–] alswidi 1 points 2 months ago

Where is the fun without danger