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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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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

Full-featured green dot at reasonable price

by CMcC, Verified Owner from TX, United States Written on January 3, 2026
This is my third Holosun; I wanted a green dot for my little SIG P365X. Install is absolutely painless with included screws. Be sure to torque to 15 inch-lbs as instructed in Holosun manual. Zeroing is straightforward with included tool.
It's very sharp, very bright. Highly recommend.
Would recommend: Yes
Was it helpful to you? Yes | No

Great compact pistol optic

by Zak, Verified Owner from MO, United States Written on December 13, 2025
Works great for slim pistols. Fits perfectly on my S&W5 5.7.
Best Used for:
  • compact pistols
Would recommend: Yes
Was it helpful to you? Yes | No

Excellent Optic

by Kirk, Verified Owner from PA, United States Written on December 12, 2025
Easy install & works great. I love this optic. I have order 3 more since I got the first one. Easy for my old eyes to see. The 32 MOA ring with the 2 MOA dot is the perfect combination. I would definitely recommend this optic!
Would recommend: Yes
Was it helpful to you? Yes | No

Great green dot optic.

by Kansas Randy, Verified Owner from KS, United States Written on December 8, 2025
I can't express how much I like this green dot-circle optic. It is small, tidy on my Girsan baby hi power, very bright and it was easy to mount. Second Holosun I have purchased from O.P. Shipping was fast and painless. Recommendation...put the sight adjustment tool on a loop of paracord and wear it around your neck, so you don't lose the small black thing out in the yard like I did. I love the sight, but Holosun is stingy with their replacement tools.
Would recommend: Yes
Was it helpful to you? Yes | No

Holosun HE507K GR X2

by Phil, Verified Owner from IN, United States Written on December 7, 2025
Excellent choice for my Springfield Armory Echelon. Great fit and great co-witness
Would recommend: Yes
Was it helpful to you? Yes | No
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