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AR15.COM
8/12/2026 9:01:12 PM EDT
https://www.primaryarms.com/holosun-eps-core-enclosed-pistol-sight-red-3-moa-dot

Starting to get emails from all the usual suspects, got two inbound. One for me and one for a buddy, should pair nicely with the 43x that’s currently wearing a Shield RMSw, which is serviceable but I don’t love it…

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8/12/2026 10:02:07 PM EDT
[#1]
Arfcom costing me money again. Just bought another 43x that will need an optic.
8/13/2026 6:25:23 AM EDT
[#2]
Already have a Red MRS Core on my 43x

Waiting for the Green MRS Cores to drop next for my Tisas NightStalker

Haven’t shot mine yet, but so far very impressed with fit, finish and function. And weight.
8/14/2026 3:35:41 PM EDT
[#3]
Nice improvement over the Shield, auto adjust seem like it actually works in few minutes of playing with it…Range Day tomorrow.
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8/14/2026 4:09:42 PM EDT
[Last Edit: juslearnin][Edited] [#4]
I wonder if the osight is pushing prices down. If so, I’m all for the competition.
New? Want to learn the basics about ARs? Want to know what kind of rifle to buy? Go to: http://www.ar15.com/forums/topic.html?b=3&f=118&t=342873
8/15/2026 9:37:03 PM EDT
[#5]
Is the Core just a simplified EPS? I don’t use any other reticle besides the dot.
8/17/2026 1:38:02 PM EDT
[#6]
Looks good.  Please give us a report when you can.
I have a Shield sight collecting dust and was going to get a gun to put it on but I'll just sell it cheap and get the EPS Core.
8/17/2026 1:40:03 PM EDT
[#7]
I need some of that AEMS Macro and Pro Max
8/23/2026 5:29:29 PM EDT
[#8]
I've put a few hundred rounds through my EPS Core on my 43x MOS. So far I am very impressed for the $280 price point. The auto brightness more quickly adjusts than any red dot that I've used, the window and thereby dot is as quick to pick up as any red dot that would fit the 43X, and the enclosed emitter glass is obviously much easier to clean than an open design

One thing I don't like is the width on a slide as thin as the 43X as it is very easy to hit the buttons or pull on the sight when racking the slide. Obviously it's a trade off for a larger window like this, and I will add that the way it blends from the smaller RMSc footprint into a wider width is as well done as I think it can be done. I've been trying to use the front serrations but that is not what I'm accustomed to, so it's taking some time.

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