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Update on my Holosun 507K milled into my CZ 75D PCR:

I finally got to the range a few days ago to test my 507K with the circle/dot reticle. I had previously sighted it in using only the 2 MOA dot. The circle is 32 MOA which is 16" at 50 yds, 8" at 25 yds and 4" at 12.5 yds. My theory was that I should be able to put the circle on the upper chest of an IDPA target at any distance out to at least 25 yds and all rounds would land inside the 8" 0-down ring on the target. My theory was correct, but that's only part of the story. The sight is fast, amazingly fast! Our monthly IDPA match Saturday, Nov. 28th was rained out, so I didn't get a chance to test the reticle further under match conditions. I suspect my times and points-down will be significantly lower.

I must confess that I thought the circle or circle/dot reticles would be pretty much useless on a handgun. I'm happy to be wrong. For people unfamiliar with IDPA targets, the 0-down ring on the target is in the upper chest in an area that contains the vitals that would most likely end a deadly threat. (Click on the target to see a larger version.) Being able to rapidly put rounds in the 0-down ring at virtually any reasonable pistol distance is not only a major benefit in a match, it might mean the difference between going home or going to the morgue if you face a deadly assault.

I plan to test this theory at 50 yds where the circle will be 16". That's still 2" less than the industry standard of 18" shoulder-to-shoulder for an average man. The vertical mark at 12 o'clock should make lateral alignment easier as you can simply align it under the head. It obviously won't work at 100 yds. but a pistol fight at that distance is highly unlikely.

Chas.

I finally got my CZ 75 D Compact PCR back from Cajun Gun Works Saturday. I had the slide milled for the new small Holosun 507K RDS. Based upon measurements, I thought it would not only fit well, but it would look good on the pistol. I couldn't be more pleased. It fits perfectly, it looks great and what little shooting I've done went well.

I sighted it in at 25 yds, based both on recommendations by my retired HPD SWAT buddy and my personal experience. I used only the 2 MOA dot for this purpose, but I plan to hit the range today and try the circle and circle/dot as well. The circle is 32 MOA and looks much like a fighter plane "sight." Battery life (CR1632) is stated to be 50,000 with the dot only, but I didn't see an estimate with the circle or circle/dot. I'm sure it will be GREATLY reduced. I have no idea if I will like the circle or circle/dot, but I do miss the triangle of my Leupold DeltaPoint Pro (DPP) sights. For me, that's the absolute best set up for any RDS, but, sadly, Leupold dropped the triangle and now offers only dots.

I was concerned the small "window" on the 507K would be a distraction since my DPPs have a very large window. Thankfully, it was not a problem at all. The key to using any RDS is presenting the pistol the same way every time and I've been doing that for many decades. When you do that, the dot is there regardless of the size of the window. The size of the window doesn't really matter when shooting with both eyes open, but if you were to close one eye, then window size would definitely be a factor.

The rear notch on the 507K serves as a rear sight that can be used with a standard height front sight for backup. The notch is very wide, but it will still work on a pinch. I need to do some shooting with it as well.

The sight looks rugged with its thick aluminum body. I would never have considered any RDS other than a DPP (I don't like RMRs - just a personal preference), except for a video I saw testing the Holosun 507K. He beat the snot out of the sight and it did fine. That surprised Aaron and me. FYI, Aaron of Sage Dynamics has done extensive testing of many RDS and his results are very educational. (See the link below to his testing methodology and results. Results start on page 16.) Here's the video for the 507K:

I can't over-stress the great work done by Cajun Gun Works in Monroe Louisiana. They are CZ experts, they do great work and they are all around nice people. As I noted in my first post on this topic, they charged $160 for the mill work and they sold me the 507K for $1 more than OpticsPlanet. They not only mounted it, they bore sighted it as well. I paid $160 to have them mill the slide of my CZ P-10C at least three years ago. They are swamped with work, yet they don't price gouge their customers even when demand is high. Thanks CGW, Dave and Daniel!

Here are some photos:



This image shows the milling on the slide and how well the 507K fits the tapered slide of a CZ.


Black on black doesn't allow you to see any detail, but this photo shows that the 507K doesn't stick out on each side of the slide. This would have been a deal-breaker for me.

Cajun Gun Works called me on Monday to let me know my CZ Compact PCR slide will be milled for the Holosun 507k this week. However, CGW has not received their order of sights. Apparently, the 407k/507k are very popular; OpticsPlanet.com is also on backorder.

Chas.

bagman45 wrote: ↑Thu Sep 17, 2020 10:46 pm Anybody have experience with the Shield optics??

I haven't shot any of them, but they use a plastic (polymer) lens that gets scratched by ejecting brass. When my friend called them to get it fixed under warranty, he was told that was normal. It may be normal, but it wasn't acceptable on a self-defense handgun. Their website claims they now have a "hard-coated" polymer lens. That may work and it may not, but I wouldn't be a beta tester.

Chas.

I have three carry pistols with red dots. They are: 1) Gov't. Model 1911 (38 Super); 2) Springfield Champion (.45 ACP); and 3) CZ P-10C. All dots are Leupold DeltaPoint Pros ("DPP") with the 7MOA triangle. I really like the triangle, but it is no longer offered. The Houston Police Dept. now requires all cadets to have a RDS on their handguns. (I can't recall if they require an RMR or is they can choose between an RMR and a DPP.) I asked one of their trainers how new cadets/shooters are doing in training and, to my great surprise, he said it is going very well. Cadets are learning to shoot far easier than with iron sights.

There are two "standards" in the industry; RMR and DeltaPoint Pro. Whatever you choose DO NOT get a RDS that requires you to remove it to change the battery. The requires you to zero your pistol again and this discourages changing the battery on a regular basis. That makes it too easy to have a dead RDS when you really need it.

Chas.