ricardo28

I did In a response to another's post about RMR plates? Slide milling and stated reasons why I felt that way based on my observations. But I am getting the feeling you just want to argue... if you didn't read any further, I also stated the RMR is a very good optic in some areas and lacks in other areas.

We agree on something. Nothing in my post was to force one view, It was pointing out observations. Not an argument but to share some downfalls of different plates.

Did you read any further? I am pointing out issues which i have observed based on a fairly big group of optics and plates as many on this forum do not get exposed to such a wide variety. Trying to share things to look out for in products.

Not sure we agree on what Irrelevant means. A dot blooming in the morning moisture is irrelevant? That is a huge concern especially if your LEO carrying in a duty holster and work in a damp area. To you, it may be irrelevant but to many more, it is a huge concern.

Fallen Behind.... Yes the RMR was a leader, they paved the way and set the bar but have not advanced any since they started. Trijicon has had the RMR and SRO out for several years now and has not came out with any meaningful changes. Auto Brightness is not beneficial to many. I have run red dots on work and competition rifles for a long time now and never felt the need to have auto brightness. Set it at mid level and forget it. Many of the guys I work with who have auto adjust don't even use it. RMR falling behind with their window size, light bending (Seen several have a curved/magnified appearance), need to remove optic for battery change? open emitter,.... Had dust on the lens blur your dot? Morning Moisture blur it? Im not hating on the RMR and still think it is very good, just think its time they update it. Several companies have surpassed the RMR in a lot of ways.

The 509T is a different mount like Nathanb said. It uses a dovetail as does the Acro. The 509T and Acro are different dimensions though.

Recently swapped a plate for one of the guys I work with. He was using a very popular plate, Same plate sold by two different companies but with different names. It did fit tight in the MOS pocket but, that was after filing the length down as it was a good bit over 1.93". Here are some comparison pics of what I'm talking about. Look how thick the black plate is at the web/ Lug and front relief. This has caused several plates bend prior to arrival or during install due to the length being to long. I also made the plate to support the back of the optic. The few plates I have made for friends are from 6al-4v Titanium. This allows me to have nearly 4x the strength of the 6061 plate and keep the low weight compared to an all steel plate. Not only is the Titanium stronger than alum, having the thin areas reinforced also adds to the rigidity. I also do not need a special coating which will add to the dimensions. I anodize the titanium which keeps the dimensions the same as I machined them to but also adds a layer or protection to the plate even though Titanium already very corrosion resistant, anodizing adds a slightly harder surface.

I would be willing to bet that if you did the test I stated above, you would change your mind about their fit. Simply look at how thin the web is where the optic lug goes. I assure you, it is very flimsy. I have seen several plates over the last year and they were all the same. Or if you dont want to take the optic off, put a feeler gauge between the front and back of the plate. If your plate is perfect, then you got an anomaly. When you have no contact at the front and back of the plate, all the recoil goes to the screws. Screws fail when shear force is applied (Recoil), they are far stronger in the direction they are meant to be used.

I didnt like Holosun at first but in my opinion, they have proven themselves more than some pistol optic companies. I havent shot much CO division but shot it a ton in training. Still a single stack guy.

Of the several plates I have seen tested, I would not recommend a single one for the 509T which is why I started making them for some of the guys I know. Forward Control Design used Tango Down ACRO plate which I have used and it is fine, made of steel, but still has that little wiggle room that I do not like. Their RMR plate is the typical design with the two screws holding it down then the two small lugs helping the screws with recoil.

Straight from their site, 6061 alum. It is also the exact same, machining and measurements as another company who put, "Steel" on the plate despite it being 6061. I believe they both source it from the same manufacturer. If you like it, then I am glad. That plate also drops in and has slop from front to back. There are several complaints on this website about that plate. I have seen several from both companies fail, bend, come in bent, and are super thin in the web. Do a test, put just the plate on, dont use the screws. slide the plate forward and backwards. You will find it has no contact at the front or back. I would also bet when the screws are tightened, there is a gap at the front. This places all the recoil to the screws.

If your sticking with the RMR, I would seriously look at a company that does the cut or grab a slide that is already cut. IMO, the RMR has fallen behind and I know more than a few people who have moved away from the RMR to the ACRO and 509T. Enclosed emitter, View thru the glass..... really should look at enclosed emitters that solve a lot of the issues the RMR has.

I do not have any production other than one here and there. If I do produce more in the future, I will look into selling on here.

I have not seen a factory plate for the Acro or the 509T but the plates they do offer do not secure the optics by anything other than the screws. They are also loose in the cut.

So I work in a swat team that was authorized red dots on their duty pistols just over a year ago and I am the primary armor. I personally shot over 12,000 rounds through a G17.5 with an Aimpoint Acro with a steel plate in the last year. Most of the guys I work with opted to get the Holosun 509T. I wanted to share some issues we have had as I see a few posts on plates. I also happen to mess around in my garage which is a machine shop so know a bit about tolerances and material. Ill primarily be focusing on these two optic plates above and especially the 509 plates. I AM NOT NAMING COMPANIES but many of the plates are garbage. First, Material; do not be fooled by the name of most plates, the material does matter. 6061 alum is garbage especially when thinned out to around .07" in the web where the lug meets. I have seen several popular vendors who appear to utilize the same manufacturer as their plates have the exact specs and even look the same. But each vendor uses a different name for the plate. Many of these plates have bent or lost the shape when the screws are torqued to 13-15in/lb. Some have even come in already bent due to the 6061 aluminum being too thin even for the packaging or shipping. The manufacturer has no idea of reinforcing critical areas as it is farmed out to the lowest bidder, likely china. 6061 will lose its shape if you take the optic off once or twice and retighten it. Second, screws; The glock uses a 2.5-.45 thread screw. Many are 6-8mm long depending on the plate thickness. These screws are garbage after a single use and please replace the screw if you remove them. I have had to drill out and clean up several threads from people reusing the screws. Often times, companies ship short screws to prevent any issues which itself causes issues of only a few threads catching and not having enough engagement. *** I order screws from McMaster Carr or other companies who have US made parts*** Third, Dimensions; The MOS cut is just over 1.9305" long. the width is not as important but is 1.0025". Most of the optic plates I have measured are well under 1.925 and usually closer to 1.92" This does not seem like much but when you combine a small screw with the energy of recoil and the weight of the optic, you will destroy the screws. I have found some optics loose and once taken off the pistol, found a screw sheared off. Having a properly fit plate that is snug in the MOS cut will prevent any recoil force from breaking the screws. The screw holes should only be holding the plate down, not putting the energy of the recoil into the screws. The Holosun 509t has a dimension that I believe is important. The front of the optic has a radius of 2.8188" and the lower lug that engages the plate is only .03" deep. Luckily the 509 also has the dovetail to help hold it in place but that lower lug is not very deep. Ensuring the front radius and the lug are dimensionally correct and contact the plate at the same time is important in my opinion. This distributes the energy through the optic and ensures it is not put into one time spot on the optic. Unfortunately some of the plates I have mounted for guys were not correct in this dimension. All of the plates I have seen or put on myself are sloppy, Every one, even the steel plates. They fit like crap. Learning from all our issues, I thought it would be a waste to have machines in my garage and have made several plates for friends that are in my opinion, superior to any MOS offerings so far. Wasted some material as my machines are Manual and I learned a lot but well worth my time.