[Gary in Illinois]

I am glad I didn’t buy a lottery ticket since I am now 0 for 2 with Holosun RDS. My first one (a 407K X2) was returned because the sleep mode didn’t function. I ordered a 507K-GR X2 to replace it. I had 2 or 3 instances of the sight turning itself off (at least twice during a range session). I initially attributed this to the cheap battery included with the sight and replaced it with an Energizer. I have not had the opportunity to use the sight since that time.

I read on another thread that Holosun has indicated that some of the 507K sights have been found to be defective. I tested the sight as Holosun indicated in a message to another user. Guess what? My 507K-GR X2 did turn off from the locked state when either the + or - buttons were pushed, indicating that my sight is one of the defective ones! Not only that but my sight will no longer turn on. (Probably will if I remove and replace the battery but…)

Guess I will have to get a return authorization and send it home. I really WANT to like these but they sure are making it hard.

P.S. - Decided to return this one to the seller for a replacement that hopefully will work.

 

[Gary in Illinois]

Well, I received the replacement 507K GR X2 today. So far it seems ok. I will sight in and test with an update to this thread within the next week. I have a range day scheduled for next Monday, so wish me luck! Sure hope this one works. 🤞🏻

 

[Caliber]

My replacement is on the way. I should receive it on Monday.

 

[sawman556]

Sig really need to cut these slides for the RMRcc. I'd buy 2 tomorrow.

 

[Jay702]

I have purchased 4 different 507k X2’s in the last 6 months, and 3 of them had issues. The first one initially would not hold zero; and even though it finally does now for the most part, I use it as a spare, and should eventually send it in to Holosun

Two others I recently bought on Amazon and both of them had issues with the + button. The button would initially function, then literally a couple days later it would not work at all. I turned it off, tried resetting it, changed battery, and nothing. One of the two would work intermittently if I pressed the + button in as hard as I could. In all fairness,the first one I got and the replacement both came from the same supplier on Amazon; so it may have been an issue with that supplier or specific lot he had.

After my replacement failed, I demanded Amazon send me another replacement from a different supplier. That one so far has been excellent in the couple of months I have had it.

Even though I haven’t had the best of luck with them, I would most likely still buy another one when I do purchase my next optic ready gun.

 

[Spookster]

I have purchased 4 different 507k X2’s in the last 6 months, and 3 of them had issues. The first one initially would not hold zero; and even though it finally does now for the most part, I use it as a spare, and should eventually send it in to Holosun

Two others I recently bought on Amazon and both of them had issues with the + button. The button would initially function, then literally a couple days later it would not work at all. I turned it off, tried resetting it, changed battery, and nothing. One of the two would work intermittently if I pressed the + button in as hard as I could. In all fairness,the first one I got and the replacement both came from the same supplier on Amazon; so it may have been an issue with that supplier or specific lot he had.

After my replacement failed, I demanded Amazon send me another replacement from a different supplier. That one so far has been excellent in the couple of months I have had it.

Even though I haven’t had the best of luck with them, I would most likely still buy another one when I do purchase my next optic ready gun.

Be wary of ordering weapon light and optics through Amazon. Lots of counterfeit/fake ones.

 

[Birddog1]

I got mine back from the recall on 8/6 but just called Holosun again today because mine doesn’t seem to want to go into sleep mode. They said it could be the vibration from walking across the floor while it’s on the dresser so I guess I will see if I can find a more stable place

 

[Gary in Illinois]

I got the replacement 507k sighted in this morning and it seems to be working properly. If anything changes I will report back. So far, this one seems to be ok but I still have my fingers crossed.🤞🏻

 

[Trackrider54]

I have three Halosun sights (2 - 507c and 1 - 507k both in green). I've never had an issue with any of my sights. Even my cheapo $89 UTG I have on my .22 plinker has been perfect and exceeded my expectations.

I did, however, have to send one Halosun back that I ordered off Amazon. The one I received had clearly been used and returned. The box has been opened and it was missing screws. Amazon exchanged it, no problem, but I should have known something was up because it was a really good price even though the ad didn't say anything about it being used or refurbished.

When buying online where you can't see and touch the actual item...play close attention to the return policy. I've received some less than ideal stuff when I found a good price on things. Sometimes you win, and sometimes you lose. I bought a Romeo 1 Pro online for $250 and I thought it was probably a scam...but it was new in the box. Works great.

 

[Gary in Illinois]

Well, I have had several range sessions with the replacement HS 507k now and all seems to be well. I have checked and re-checked the operation of the sleep function as well as the activation from sleep. I am at the point of fairly high confidence in this sight. No issues at all.

 

[CZSIG-Vinny]

Sig really need to cut these slides for the RMRcc. I'd buy 2 tomorrow.

I have two HS 407K's I got a year ago, one I just sent back that was draining Duracell batteries weekly and eventually went dead. HS promptly replaced with newer HS407K-X2.
I love my P365-X and the HS407K/507K because of it's compact size.

But honestly, for EDC I trust my CZ Rami that I had milled several years ago for an RMR-01 that just works.

Now that SIG just intro'd a P365 FCU as a separate drop-in item (like P320) I'm thinking they could offer the XL or regular slide milled to RMRcc spec. Ideally milled between taller night sites that would provide BUIS. I know this can be done, as I believe several mill guys like Fabricated Arms have done it.
Having the RMRcc slides cut with BUIS; available directly from SIG, would address the issue of Department acceptability, and also make a perfect EDC IMHO.

 

[Poppastar]

Hey Vinny, gotta photo of your Rami? I'll bet it's sweet.

 

[CZSIG-Vinny]

Hey Vinny, gotta photo of your Rami? I'll bet it's sweet.

Yes thanks, like my SIG P229 RX it has perfect co-witness sights and my preference DA/SA. Vedder Light-Draw-Forward Cant holster only needed a fraction of material filed to accommodate the RMR. Perfect retention.
Nice workmanship by Cajun Gun Werks.

 

[Trackrider54]

Aw man...I want a Rami so bad. I already have an SP-01, P-01, and a 97....all Cajunized. The Rami would slot right in.

 

[Poppastar]

That's really nice Vinny, thanks for sharing. I guess because of the shape of the slide, to my eye it looks like the RMR and plate is higher in the back than the front....

 

[CZSIG-Vinny]

That's really nice Vinny, thanks for sharing. I guess because of the shape of the slide, to my eye it looks like the RMR and plate is higher in the back than the front....

Yes, you have a good eye! There's more than a 2 degree forward tilt to the cut.
Often with short barrel locked breech pistols, the rear iron sights will be considerably taller than the front sight. That's because the barrel is actually forward tilted at lock-up (relative to top surface of slide). If you don't angle the mill cut accordingly; the optic will run out of enough elevation adjustment to zero. Cajun Gun Werks understood this and milled it properly.
No problem zeroing, and even with the short barrel, it's amazingly accurate with the Red Dot out to 25 yards + (I can't see targets much further than that with my 'ol eyes).

 

[sawman556]

I have two HS 407K's I got a year ago, one I just sent back that was draining Duracell batteries weekly and eventually went dead. HS promptly replaced with newer HS407K-X2.
I love my P365-X and the HS407K/507K because of it's compact size.

But honestly, for EDC I trust my CZ Rami that I had milled several years ago for an RMR-01 that just works.

Now that SIG just intro'd a P365 FCU as a separate drop-in item (like P320) I'm thinking they could offer the XL or regular slide milled to RMRcc spec. Ideally milled between taller night sites that would provide BUIS. I know this can be done, as I believe several mill guys like Fabricated Arms have done it.
Having the RMRcc slides cut with BUIS; available directly from SIG, would address the issue of Department acceptability, and also make a perfect EDC IMHO.

I think Maple Leaf Firearms can do a RMRcc cut on non optics ready P365 slide as well. Not sure the already OEM precut 365X/XL slides can be recut for the RMRcc??? I don't think they can be. I have a RMRcc on a P365X slide with adapter plate. It's a bit high, but works fine. Front sight is useless in this configuration. I also have one with a Shield RMSc. I really like this optic, but it does lack the ability to adjust brightness and it's really not a "combat grade" sight. As a CCW sight I think it's fine and the built-in rear sight on the RMSc does work with the #6 front sight. At least well enough for a backup sighting option. I also like the fact the RMRcc has a metal sealing plate where the OEM RMSc cut utilizes basically a sticker as a sealing plate(Sig needs to make a metal sealing plate). The P365 firing pin block safety seems to limit the depth these slides can be cut. Ideally the RMRcc cut with rear sight cut forward the optic would be the best way, but I don't believe it's possible. I actually have a G43X slide at Battle Werx to be setup this way. My RMRcc will be going on the Glock once I get the slide back. The Holosun doesn't interest me, but the RMSw may.

 

[CZSIG-Vinny]

I think Maple Leaf Firearms can do a RMRcc cut on non optics ready P365 slide as well. Not sure the already OEM precut 365X/XL slides can be recut for the RMRcc??? I don't think they can be. I have a RMRcc on a P365X slide with adapter plate. It's a bit high, but works fine. Front sight is useless in this configuration. I also have one with a Shield RMSc. I really like this optic, but it does lack the ability to adjust brightness and it's really not a "combat grade" sight. As a CCW sight I think it's fine and the built-in rear sight on the RMSc does work with the #6 front sight. At least well enough for a backup sighting option. I also like the fact the RMRcc has a metal sealing plate where the OEM RMSc cut utilizes basically a sticker as a sealing plate(Sig needs to make a metal sealing plate). The P365 firing pin block safety seems to limit the depth these slides can be cut. Ideally the RMRcc cut with rear sight cut forward the optic would be the best way, but I don't believe it's possible. I actually have a G43X slide at Battle Werx to be setup this way. My RMRcc will be going on the Glock once I get the slide back. The Holosun doesn't interest me, but the RMSw may.

Fabricated Arms (and probably other good SIG milling shops) can provide exactly what we're talking about........
An RMRcc milled into a P365 slide between two taller night sights that lower 1/3 BUIS. IMHO The perfect Red Dot EDC:

P365 Optic Cut: Trijicon RMRcc – Fabricated Arms LLC

fabricatedarms.com

 

[Genesis]

Is anyone else having issues with their Holosun sights? I purchased a 407K-X2 that I returned because the auto sleep feature never worked.
I then purchased a 507K-GR X2 that I currently have installed on my P365XL. After selecting my preferred reticle style, adjusting the brightness to my liking and zeroing the sight I turned on the locking feature to prevent inadvertent changes due to a button being bumped.
The auto sleep and shake to wake features seem to be working on this unit. However, I have had at least two occasions when the sight was off when I raised the pistol to shoot. This occurred during an active range session. Needless to say I find this pretty disturbing for a sight that is being used on an EDC.
I have not been able to reach anyone at Holosun to discuss the issue with because they are apparently too busy to answer the phone (other than a recording). Is anyone else having any problems similar to this with their Holosun sights? Or, am I just really unlucky.

I am having a problem with the minus button on my 507k

 

[Roger Z06]

Sig really need to cut these slides for the RMRcc. I'd buy 2 tomorrow.

Or just send it off to have it cut like I did and it cost you $60
Edit* unless you have the optic ready one

which you should just post for trade then send the non optic plate one to get cut