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  • Ray Campbell

Holosun 507C: The Underdog That Beats The Giants

The Holosun 507C has been successfully competing against commanding brands. So if you're looking for an open reflex optical sight, this underdog will surly increase your accuracy and provide faster target acquisition. Check out these personal hands-on reviews.

FYI, Prices and ratings are accurate as of time of writing.


Holosun 507C Open Reflex Sight

Top-rated: 1,434 ratings | 243 answered questions


Holosun 507C Open Reflex Sight

Highlight: Solar Failsafe allows the red dot sight to remain powered when the battery fails. The Shake Wake feature shuts the LED off during periods of inactive movement.

Most helpful review: "This is my third Holosun optic (507c, 510c and 512c). Nuff said. Built like a tank, great features (2MOA dot alone, 65 MOA -32 on the 507c- reticle, a combination of both). "Shake awake" technology should be renamed "caress awake" or "whisper awake", is that sensitive. Smallest parallax, tinting level is perfect, a ridiculous battery life backed up by solar panel. Simply, the best value for money." — Fos

Get it from Amazon now: $309.99

"This thing is way better than the trijicon rmr. Much more clear, bigger glass, astigmatism friendly, multiple reticle choices and much brighter. Fits in rmr custout and solar backup to boot. This thing is awesome. I'm gonna get the bigger 510 for my ar now." — Seth
"I love this little RDS. It's very compact and just makes a small footprint on my Glock. I had to use a Rear Sight Mount For Glock especially made for Glocks that don't have an MOS. Mine was a Glock 36 .45 ACP. It's made by Strike Industries and screws into the top of my Glock. The screws don't go into the metal, they just make it a tighter fit and I had to remove the back plate and put in a different back plate that comes with the adapter. The back plate has a screw that screws into the replacement back plate which makes it very sturdy. Now my RDS is rock solid. See 3rd and 4th pics. I've been having my RDS for a few weeks now, and I love my Holosun. You can have it show just a dot, dot and circle, or just circle. It has an auto brightness feature, that brightens in like sunlight and at night it dims. It's got a motion sensor that detects movement and turns on when you need it to. Otherwise it turns off after 10 minutes of no movement. You can set it to 10 minutes, 1 hour, 12 hours or disable the sleep mode altogether. It has 12 brightness settings. The battery compartment is on the right side, and fully accessible anytime. The battery has life of 10000 hours with dot+circle and 50000 hours with dot only. I highly recommend this RDS. It's kinda pricey but worth it." — Bbert73
"Purchased this for my Walther PDP after ordering the mounting plate (which is free from Walther).
The mounting plate Walther sends has screws too large for their own gun. Just wow. Fortunately this red dot comes with mounting screws that are the correct size.
You just have to remove the red dot from the plate it comes with and install it onto the plate Walther sends you.
Officially you need a torque wrench, which is then set to whatever number your gun's manufacturer specifies. In the case of Walther that's 18 inch-pounds (not 12 or 10 as some people seem to think). Much more importantly, use a dab of BLUE locktite (not red) on each screw to make sure they don't work their way out. Over a relatively short amount of time, the force of the slide action is going to shake them loose if you don't.
The documentation states this red dot is calibrated to be accurate at 25 feet out of the box. I used a boresight laser to align mine and found it was slightly off, but not by much, and not enough to prevent me from hitting 5-6 inch targets 50-60 feet away." — A. J. Bright
"After trying and failing with 2 different vortex 3 moa red dots, I picked up this Holosun. By comparison, the holosun is superior in every way.
I love the 2moa dot. It's hard to find quality and small moa 3 or less. The multi reticle is awesome! Sharp, bright and 3 choices/combos. The shake awake feature works as advertised, so your battery won't drain if you forget to shut off your unit. The positive click when adjusting the windage and Elevation is solid and can be felt even while wearing gloves.
Needed very little adjustment at the range to obtain bullseye. Looks good on my pistol. I was a little worried about the design looking tall or clunky but it's actually quite appealing in hand.
This red dot was well worth the additional $59 of its vortex and burris competition. My dad has a burris fastfire 3 on his 22 pistol and after trying my holosun, he will be switching. We both absolutely love it!" — Xtopher

Get it from Amazon now: $309.99


Holosun 507C Open Reflex Sight

"The holosun 507c is fantastic... I mounted it to my 2011 using a trijicon mounting plate (this optic fits RMR footprint)
Install was as simple of tightening two screws. Zeroing was the easiest of any pistol optic i have ever used and was even pretty close out of the box (it even said it would be close in the manual).
The optic has a setting for every situation you could ever need, it has the circle, dot, and circle with dot. The circle i have used much but John from ASP swears by it. The dot is fantastic for longer range shots and i was even able to us this for very repeatable 100yard shots. The circle dot is PERFECT for everything inside 50y yards, and aids in finding the dot fast.
More impressive is the durability of this tank of a red dot. I have an RMR, and I'm almost convinced the RMR eould break before this holosun. The aluminum is thicker than a snicker.
The glass is pretty clear and it's a decent shape for cleaning powder off of after a range session.
The shake awake function is flawless, the auto time off can be changed to different times, and the brightness settings work for every situation. I don't personally use the auto brightness, but it does work well. This optic is a far better than it's price suggests, it's an RMR killer for sure." — Brian
"I already own an RMR and it has been flawless, but I heard good things about this optic and I thought, for the lower price, I'd give it a chance. The 2 moa dot with 32 moa ring is fantastic. The 32 moa ring allows me to quickly acquire the target, and the 2 moa dot assists with taking highly precise shots. I've only taken it shooting 6-8 times so can't speak to longevity or durability but so far, it's awesome.
Update: had for about 6 months now and still love it! Bought for 3 gun pistol. The ring/dot combo allows for quick target acquisition and precise shots when needed. Appreciate it more every range day. Enjoy my RMR a little less, but since it's on a C.C. pistol I trust it to work so for now it stays. If the Holosun proves to be durable I may have to replace the RMR." — JD04073
"I'm not sure if my unit is defective but when held at arm length the red dot is blurrier than a $20 red dot. Sure all of the other features have worked flawlessly. The solar and shake awake is great. I just don't know.
Apparently there's a special filter in the Holosun and other high end lenses that reflects light back more efficiently. This is used to conserve battery life. That's how it's always ready to be used. This can cause more bloom in people with astigmatism. Which pretty much everyone has." — three_legs

Get it from Amazon now: $309.99

"I purchased this sight for my Glock 19 Gen5 MOS and it is perfect for this firearm. First off, I absolutely love it. It holds zero like a champ, I have absolutely no worries about durability, and I know when I need it, be it practicing at the range or, God forbid, having to defensive action to preserve my life or someone else's, I know I can count on this optic.
Is this a good sight? Yes. Is this a good budget option? Yes. Will you regret your purchase? No. Will you ever think twice at any point after you get her zero'd? Absolutely not." — Markham
"Holosun is a great edition to my SFX. Zeroing it in was easy. It's extremely bright and seems to be very durable and affordable. The buttons are tiny would be my only complaint." — Vaughn
"You can't find something this feature-rich for so little money anywhere else. I've now purchased two of these.
The auto brightness feature is awesome, the battery tray is easy to use and you don't have to pull the optic off to get to it, setting zero is extremely simple, and it holds zero really well. Aaron at Sage Dynamics tested one through 10k rounds, including drop testing, and even he didn't have problems. Mine are just on range toys. Great optic! Groups so well it should be considered cheating." — MetalWolf
"I bought this optic to mount on the pic rail of a pcc. Unfortunately, the mount did not come with the optic from the factory as the description on Amazon says. This seller made it right for me, and I really appreciate the great customer service they've provided.
The optic itself is top notch. I love the reticle and shake awake. It is also at the best price here I could find with prime shipping. If you don't have prime, ymmv." — Todd

Get it from Amazon now: $309.99

"Got this to install on a custom Glock 9mm, and I'm happy with the result. I've put about 300 rounds through it so far and it appears to be durable and still holding zero. The auto adjustment of the reticle brightness depending on ambient light is a cool feature that works well, and people think the crosshairs is slick (you can switch to a standard dot if that's what you prefer). Overall a solid purchase." — Zac
"Couldn’t ask for a better optic for my canted RDS on my AR-15. It feels durable, and the battery life this thing boasts is amazing. I love the shake awake feature and it’s a great pairing to an LPVO (low power variable optic). I got a cheap-o 45 degree offset pic rail and it rests at a perfect height for maintaining cheek weld when moving between near and far targets. Love this little optic, great bang for your buck!" — Joseph LeRoy
"I've been a shooter for most of my life but as I get older it's harder to see both sights and my accuracy was impacted by it. The Holosun sight works great, fit my glock MOS, and has allowed me to return to my accurate shooting because I'm only focusing on the red dot now instead of a front/rear sights." — Rob B.
"These are outstanding! Fit perfect in the RMR cut. Be sure to use a thread locker. I had lockight on screws (blue), but the optic fell off after a few sessions at range. I applied more locktight, and it is holding this time around. Optic is on a 19. Still checking each time done at range...and that is tightened to specifications (15 inch pounds)." — AvidOutdoorsman
"Really sold on this one after using it a bit, Have had it in low light and outside easily adjusts for different lighting. Very nice to be able to just use 2 MOA red dot or the dot and the 32 MOA reticle. Haven't found a use for just the reticle. Very good value and it worked right out of the box very little adjustment needed," — MJJ
"This sight has all of the features I want at a good price. It's well designed and well made. One feature I really appreciate is the "side drawer" battery compartment. No fighting a hard to seat screw down disc cover. All-in-all it's great." — Jim McKalip

Get it from Amazon now: $309.99