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I'm purchasing a Ruger PC Carbine and your Red Dot Sight what is the difference between the Full Co Witness and the Lower 1/3 Co Witness Mount? — 1 Answer

by Paul, from OR, United States Asked on April 22, 2018

Name Trijicon MRO Full Co-Witness Mount w/ Trijicon Q-LOC Technology (4.7)
$152.00 $138.99 Save $13.01
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Answered by Chet Manley, guest, from VA, United States, on May 13, 2018

Full or Absolute co-witness means that with standard height iron sights on an AR, the sights will line up dead center in the middle of the glass. A lower 1/3 co-witness means that the optic sits higher and the same set of iron sights will line up in the lower 1/3 of the glass.

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Last updated 2025-11-12 UTC.