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View Full Version : Brain Fart. Need help on Sight hight.


DocMedic
09-30-2014, 10:49
What is the center height of a reddot to the center of the barrel bore using a basic AR-15 Upper reciever, if the reddot is a 1/3 witness setup. I need it in inches.
davsel
09-30-2014, 11:07
I believe it's 2.55906" (65mm) for the irons. Add 0.275591" (7mm) for a 1/3 cowitness red dot = 2.83465" (72mm)

Rough estimate 2.6" + 0.3" = 2.9"
Different mounts/risers have different heights.
tmleadr03
09-30-2014, 11:32
http://i450.photobucket.com/albums/qq221/boomslangX64/BeowulfX_Deluxe_Closeup-1280x720_zps78998a8c.jpg
davsel
09-30-2014, 11:34
I forgot about that one. Are they still in business?
tmleadr03
09-30-2014, 11:40
I forgot about that one. Are they still in business?

He never got into business. He was doing a kickstarter or some such. And got absolutely railed by arfcom. Pun was totally intentional.
DocMedic
09-30-2014, 11:51
I believe it's 2.55906" (65mm) for the irons. Add 0.275591" (7mm) for a 1/3 cowitness red dot = 2.83465" (72mm)

Rough estimate 2.6" + 0.3" = 2.9"
Different mounts/risers have different heights.

That sounds about right, My mounted scopes are about 2.75 inches, and the CompM4 Seemed it needs a higher cheek weld.