Phooey! Broken front sight clamping screw

[jmoore]

Loosening the clamping screw this morning at the range during my first outing w/ the 10/43 No4 Mk1 ROF (F), it went POP! Sheared right in twain. Thought I'd broken the tool at first, but no...

Should I attempt to drill out the remainder or is it too hard? I reckon that the sight base can be removed w/o breaking anything else, but the screw stub resists a file rather more than was expected! No EDM to which I have access any more, so what to do?

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