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Primary Arms Extra High 1-inch Tactical Rings place the center of your 1 inch tube scope 1.5 inches above your 1913 Picatinny rail or Weaver rail platform.
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Primary Arms High 1-inch Tactical Rings place the center of your 1 inch tube scope 1.25 inches above your 1913 Picatinny rail or Weaver rail platform.
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Primary Arms Low 1-inch Tactical Rings place the center of your 1 inch tube scope 0.75 inches above your 1913 Picatinny rail or Weaver rail platform.
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