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Holosun HE507K-GR X2 1x Green Dot Reflex Sight
As Low As $319.99 Save Up to 15%
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Most Helpful Positive Review Great sight on Sig P365XL
I love this thing. Bolted right onto my Sig P365XL everyday carry pistol (with its optics cut slide) in just a few minutes, needing a 5/64" hex wrench to remove the Sig rear sight. Small, fits very low, protrudes less than .80" above this slide. I prefer the default reticle, dot with circle, for spe...
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Most Helpful Negative Review CHECK OPTIC FOR POTENTIAL ISSUE
If the unit is in lockout mode, turning the unit off by pressing both the "+" and "-" button at the same time will prevent the unit from turning back on until the battery is removed and re-inserted. I had it happen to me once but chalked it up to a dead battery, but after reading the other reviews, ...
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Clarity is terrible. Very blurry

by Smith, from MI, United States Written on May 18, 2026
So blurry I thought something was wrong with it. Returned and got the exact same model and had the same issue. Will be returning this one as well for a different brand. Extremely disappointed.
Pros:
  • Easy to install and comes with necessary screws
Cons:
  • very blurry
Would recommend: No
Was it helpful to you? Yes | No

Great green dot.

by Bob, Verified Owner from AR, United States Written on May 10, 2026
This is the 4th one I have on various pistols. All keep zero and batteries last a long time.
Would recommend: Yes
Was it helpful to you? Yes | No

Holosun HE 507K GR X2 Green Dot.

by AL, Verified Owner from TX, United States Written on April 26, 2026
Excellent Green Dot. Fits my 43X perfect. Optic height and width are a great fit. Green Dot is smother and easier on my eyes.
Would recommend: Yes
Was it helpful to you? Yes | No

LOUIS MARILLLA

by lou, Verified Owner from NV, United States Written on April 25, 2026
Great Optic, fast shipping, would buy again. THANK YOU
Would recommend: Yes
Was it helpful to you? Yes | No

Holosun HE507K-GR X2 1X Green Dot

by Bibby, Verified Owner from KY, United States Written on March 10, 2026
Love the Holosun Green dot and I love all the features on it. Thanks for a great product.
Would recommend: Yes
Was it helpful to you? Yes | No

Holosun HE507K-GR X2

by Dover, Verified Owner from FL, United States Written on February 11, 2026
This 507k Holosun was too easy to install on my Sig P322. Additionally, the optic is user friendly and easy to boredight and zero… I’ll definitely buy another for my other handguns.
Would recommend: Yes
Was it helpful to you? Yes | No

Highly recommended HE507K-GR-X2-ACSS

by JLC, Verified Owner from TX, United States Written on January 22, 2026
I’ve been running the HE507K-GR-X2-ACSS for EDC and it’s easily one of the best micro pistol optics I’ve used.

The ACSS Vulcan reticle is the real standout. On the draw, the outer reference ring immediately guides your eye to the center dot if your presentation isn’t perfect. It’s noticeably faster than a standard dot and eliminates “dot hunting” altogether.

The green reticle is extremely crisp and easy to pick up in bright daylight and indoor lighting. Battery life has been solid, the side battery tray is convenient, and I appreciate not having to re-zero when swapping batteries.

Build quality is exactly what you’d expect from Holosun—rugged housing, recessed glass, and dependable electronics. It’s compact enough for concealed carry, co-witnesses well with irons, and doesn’t add bulk or printing.

Would absolutely buy again. Highly recommended for EDC.
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Good optic

by WB, from ID, United States Written on January 19, 2026
Put it on a P365 and it works great. Easy to zero. I’ll probably buy another one.
Would recommend: Yes
Was it helpful to you? Yes | No

Great Red Dot!

by Steve M., Verified Owner from IL, United States Written on January 5, 2026
I recently purchased a Sig P365 X Macro. I shot about 1000 rounds through it before I decided to purchase a red dot. I have a couple Sig red dot sights on my other guns, so this time I decided to go in a different direction. I purchased the Holosun while it was on sale so it was the perfect time to buy one.

I went to the range after mounting the new Holosun to my Sig P365 X Macro. I moved the target to 10' and shot, hitting dead center each shot. I then moved the target to 30' and needed to make a minor adjustment before it was hitting dead center each shot. The adjustment was easy to make with the tools that are provided. This red dot comes with an adjustment tool and three different size mounting screws.

I would recommend this red dot and I am planning on purchasing another one for my CZ.
Pros:
  • Easy to mount
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

better than I hoped ..so far

by Brian P, Verified Owner from OH, United States Written on January 3, 2026
So I got the Holosun 507K-GR because it direct mounts to my 590S. Whole I loved the feature set and the green reticle in theory, I was sceptical of the footprint Mossberg choose to go with for a direct mount option. I was really concerned about such a small reticle on a long gun.

After my first spring session, I have to say...I was wrong. Compared to the standard bead site system that comes with the stock I was blown away.

1) I wear glasses, so I know longer have to strain against the stock too get my sight picture
2) sight picture is more than enough to see my target and what's around it. It just works really well with my 18.5 inch compact shotgun.
3) my ability to transition between targets is at least 150% faster than the standard bead set up.
4) the green reticle is ready to pick up and with the 12 brightness settings, I'm able to easily pick up the reticle without trickle or too much brightness. I settled on the 32 moa circle without the dot.
Would recommend: Yes
Was it helpful to you? Yes | No
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