Fine tune sight screws
The rim of the front sight screw is what moves the sight blade, where it engages the bottom of the blade on the right side. Quite often the screw rim gets out of round and will bind up. The German method of repairing these after WW1, was to cut back the barrel at the rear of the sight base and replace the sight with a welded on, fixed broom type sight. Don't attempt to move either screw if tight, with an original type tool. You'll just pull the tool pins out. Best to make a heavy duty tool out of a surplus screw driver for a job like this. TH
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