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1972

  1. 44 Mag Carbine gas block extra hole?

    Ruger Semi-Auto
    My 1972 44 mag carbine was due for a cleaning. I noticed that the gas block had an extra hole on its under surface in front of the sloping clean-out hole. It is threaded and empty. I do not have an exploded view of the 1972 model, but other models show no such hole. What's up with that? It...
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