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AR15.COM
8/2/2025 1:54:43 AM EDT
And also, does it measure the light coming from the front of the optic and adjust the reticle brightness to match that, or does it only measure light coming from the top or sides (like a Holosun 507c)?

For instance if you were standing in a covered bench, looking at a target against a white backdrop on a sunny day, would the reticle be too dark to see?
8/2/2025 3:17:46 AM EDT
[Last Edit: chevrofreak][Edited] [#1]
It works fairly well, until you shoot at night with a weapon light and your light reflecting off of the smoke causes it to go max brightness.  I don't use that sight on anything anymore.  I prefer a sight that I can manually adjust.
8/2/2025 8:34:52 AM EDT
[#2]
Skip it.  Get the manual adjustment model.  You'll thank us later.  
8/2/2025 9:04:28 AM EDT
[#3]
RMR auto brightness is decent. I wouldn’t bother personally.


The RMRHD’s auto brightness is the best in the game and it isn’t even close. It’s absolutely perfect in EVERY lighting condition. But it’s also almost twice the price of a regular RMR. Lol
8/2/2025 9:04:41 AM EDT
[#4]
It works pretty well in 87% of scenarios.

Covered and shooting to sunny areas was fine with it. Night shifts and flashlights get a little weird..



The RMR HD is pretty amazing though. They changed the sensor and you can adjust the range of brightness it’ll go
8/2/2025 10:02:19 AM EDT
[#5]
Can fail and become so bright as to fill the screen and be unusable then the factory says it's ok, it's within specs, (Happened to two different units which each went back to the factory twice)  I read later that they had changed the source of their components.
8/2/2025 11:28:41 AM EDT
[#6]
I have yet to look through an auto brightness red dot that I was happy with.
I choose violence
8/2/2025 1:47:01 PM EDT
[#7]
It's ok, not great. I have RMRs and Holosuns and regardless of what I use them for, I set the brightness manually.
"Now none of the frightened soldiers moved, for they saw that cowardice and valor purchased equal plots in the sniper's killing field."

"Not interested in a lecture by either side”
- isaidme
8/2/2025 7:33:37 PM EDT
[#8]
Quote History
Originally Posted By Brawnydog:
I have yet to look through an auto brightness red dot that I was happy with.
View Quote

You haven’t looked through an RMRhd then.

The auto brightness is dead nuts perfect in absolutely every lighting scenario.
8/8/2025 8:07:03 AM EDT
[#9]
Is there an auto shut off on the HD? Mine hasn't stayed on over an hour since new.
8/8/2025 8:33:41 AM EDT
[#10]
Quote History
Originally Posted By TactiCoolBro:

You haven’t looked through an RMRhd then.

The auto brightness is dead nuts perfect in absolutely every lighting scenario.
View Quote

Originally Posted By Lumpy196:
I don't need an "ignore" function on this site, I need the ability to tag government agent user names.

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