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Unit fits on end of my rail and stil able to use the front pop up MBUS sight laser has a slight bloom at close distant but is good after 12 ft.
Unit is advertised on site as taking a CR123a battery, that is not correct, it uses a single AA battery. Holosun’s website has no info on unit
as it is fairly new. I usually check owner manuals before purchase, but it was unavailable for the IRIS series. Had I known about the AA
use, I mostly likely would have not purchased. The only reason I gave it a recommendation to buy is because it does work fairly
well for the price. Beware the only IRIS laser/illuminator that uses a CR123a is the model that has the laser and IR combo, all the others use AA batteries.
Did a lot of research and determined that the 510C was the best budget reflex optic for my application.
I like the green reticle option and that you have the ability to switch between 2 MOA, 65 MOA ring and to
have both. The sight is very well constructed and I like the addition of the solar cells embedded into the
sight as back up. The only regret is that is not made in America and isn't powered by CR123A batteries, now
I have to carry and extra CR2032 in my stock in case of battery failure.