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Railroad tracks are also carbon steel... Not as high a carbon as other alloys, but far better than mild steel.steel 1911? find a norinco. the Chinese built them with reclaimed rail road track. mine weights about 14 lbs.
You can find them at various places... I've seen them on Brownell's, MidwayUSA, and other vendor sites... Or you could go to your LGS and ask them to get you one... Or go to a gunsmith and have him get you the one you want. These are not crazy rare items after all.I'm sorry, you are 100% correct - I meant "carbon steel". Editing OP now...
Yup... Plenty of frame options out there.STI or Caspian from Brownells.