HOLOSUNHE507C-GR X2 / HS507C X2 2 MOA Dot & 32 MOA Circle Open Reflex Pistol Sight - Durable Shake-Awake Solar Failsafe Parallax-Free Aluminum Sight for Full-Sized Handguns - Green & Red Dot Options

I've gone through a few red dots and this is by far the best I have used on my handguns. The red dot (I chose red) has three different options to choose from with varying brightness levels. Solar battery backup - what?? Battery is easy to replace without having to remove the optic from the handgun - very nice!! No re-zero fun... Now for the real test - I mounted it up on a SW22 Victory (.22 handgun with a bull barrel) and took it to the range to sight in. Longest my lane had was 20 yds - pretty far for a .22, but what the heck..First 5 were on paper (low-left), next 5 were high-right, by my 5th series of 5 shots I was putting all 5 rounds in a 1.5" box at 20yds. Brought it in and shot at 10 and 15. It was ridiculous how accurate it was, looking through it was great and no abberations or weird optical coloring/shifts. The red dot was crisp (minus my slight astigmatism), intensity adjustments really helped, I LOVE THIS OPTIC!!

Looks wekk made and looks awesome on my ruger 22/45 tactical. Holds zero no issues. Extremely easy to install. Make sure it’s torqued to specs. Find out how on YouTube

Great RDO. Holosun has been knocking it out of the park. Reliable and tough. Not the cheapest but not the most expensive wither. In exchange you heat great quality.

Outstanding red dot sight. Love Holosun sights. Real fan of the dual dot/ring in these sights. Ordered red one this time for daylight shooting. Easy to mount and use.Highly recommend

Everything works well. Fits perfectly. Quality is in the name and it speaks for itself. Everything was new in the packaging.

Works great helps a lot

I like this product quite a bit. The green is easy to ID. This is my 4th Holosun and this one doesn’t disappoint. The challenge is the mounting plate…. I have had more challenges getting the right one, but that’s nothing on Holosun. Would buy again.

UPDATE to below:I received a replacement HS507C, and it has worked flawlessly. The reticle and brightness modes adjusted as expected, and when the optic is set properly, it's easily daylight bright against lightly-colored backgrounds. I installed the sight as an off-set backup to an LPVO on my rifle. It was easy to zero and serves the purpose well. I've been a bit rough with the sight, not taking any special care to protect it, and it has gotten bumped around on other rifles and smacked against a picnic table a few times. So far it has held zero well. Seems decently built.One criticism: if used as an offset alongside an LPVO, the control buttons are hard to reach, as they sit between the red dot and the LPVO (unless you're a lefty).*********************I received a HS507C that had obviously been opened already; it had a 2nd sticker covering the original package seal. I could see through the sticker to the original, split seal below.When I powered it up, it did not function correctly. I could change between the available reticles without any problems, but the dot and dot/circle only had two functioning brightness levels. Neither of the available settings was daylight bright. I could only see the dot and reticle within darker rooms inside the house. If I pointed the sight at a lightly colored wall, or out a window, the reticle disappeared. Useless.I popped in a new battery to make sure that wasn't the problem. No difference.Amazon is sending a replacement, but there seem to be many people complaining about receiving open box items, so I thought I'd state that I also received an open box item. Buyer beware.I will update the review if/when I receive a functioning sight.