“Co-Witness” was a term I wasn’t familiar with until Say Uncle brought out the 6.8 SPC upper at Gunblogger Rendezvous II. Since then, it’s been added to the list of things that I ‘need’.

“Co-Witness” refers to a the use of both an electronic rifle sight and a backup mechanical sight to: A) confirm the sight alignment, and/or B) to serve as a backup in case of electronic sight failure, low batteries, etc.

A.R.M.S. #40 LPI was so impressed with Say Uncle’s AR sighting setup that I asked him about the specific model number (it’s an EOTech Model 552).

Upon acquiring one of these marvelous gadgets, I set about to find the backup, co-witnessing sighting system.  There were several choices, but I went with the A.R.M.S #40 Low Profile flip-up sight.

The sight picture on the AR now shows a glowing red dot positioned at the peak of the front post and the rear aperture perfectly frames the EOTech’s circle outlining the dot.


Thanks to Say Uncle for the tip!

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