One pic is showing vastly different tones of the finishes on the frame and upper. The toggle axle retaining pin also looks blued. A check of the interior of the gun can be made when it is field stripped, to see if the bluing is properly absent within.
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"... Liberty is the seed and soil, the air and light, the dew and rain of progress, love and joy."-- Robert Greene Ingersoll 1894
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