Most any semi auto can be made with files and patience. A hand powered rifling machine can be made and rifling buttons are normally made of tungsten.
Easiest to make with a file would be rolling blocks or falling blocks. Strong enough for actions from .22 to .45-120 and .577/450 British.
I have seen the prototypes on display at the J.M. Browning museum in Ogden, Utah. You can see how the 1901, 1911, A-5, 1918, and 1919 were shaped with files.
Tools and High carbon steels might be the shortest resource.
Last edited by ArmySGT.; 08-21-2011 at 10:38 AM.
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