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  1. Help with .357 Blackhawk

    Ruger Single Action
    I have acquired a Ruger .357 Blackhawk. From what I have found I believe I have a 3 screw model. I've tried to find a serial number match but haven't had any luck. There appears to be something that can screw into the top of the frame with one little screw. Doesn't seem to have any wear on the...
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