*Note* Vortex® no longer sells any red dot optics with an absolute co-witness mount out of the box. That is to say, if you were aiming at the target with your irons, and the red dot (mounted physically right between the front and rear iron sight, were “On”) then the illuminated red dot inside the optic would be perfectly in line with the irons. Ěbsolute Co-witness – A firearm with a red dot and iron sights that exhibit an “absolute co-witness” has everything in one perfect line with one another. On pistols, this gets much trickier, as there are few “standards” out there for iron sight heights across the numerous different pistol platforms and even fewer standards about red dot height, or even how the red dot will be mounted to the pistol in the first place! There are two primary “types” of co-witness that you’ll see argued over on forums and comments sections – “absolute” co-witness and “Lower 1/3””) co-witness. On AR’s or other similar rifles with a standardized iron sight height, the only way your co-witness changes is by changing the height of your mounted red dot via different mounts. If someone on the range ever looked at your firearm with a red dot on top and asked “What are you running for a co-witness?” they’re trying to figure out how your irons are set up height-wise in relation to the height of your red dot. So we’re all on the same page, let’s pin down what the term means, why it’s important (Or maybe not as important as the internet wants you to believe), and what co-witnessing is *actually* for. If you’re brand new to the term, fear not, even those of us who have heard about it, discussed it, and even used it in practical application still can’t seem to get it straight or even agree on “which type” of co-witness is best. If you’re in the market for a red dot to put on your firearm, regardless of type, chances are you’ve seen the term “co-witness” thrown around in your search. Everything You Ever Wanted to Know About Co-Witnessing Part Oneįor a pretty simple idea – keeping your iron sights visible through your optic – co-witnessing can become pretty complicated, especially if you get caught up in the online chatter.
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