Yes, salt blued Lugers are blued virtually throughout. Instead of the multi-step process of repeatedly wiping the surfaces with chemicals, rusting, boiling, and carding--as one would do for rust bluing--the components are suspended in a tank of hot chemicals and removed after sufficient color has been built up. Plugging the barrels keep the solution out of the bore and chamber.
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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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