![]() The simple fact of the matter is that the whole “plate” concept is great from the gun Mfg side. Screws fail when shear force is applied (Recoil), they are far stronger in the direction they are meant to be used. When you have no contact at the front and back of the plate, all the recoil goes to the screws. ![]() If your plate is perfect, then you got an anomaly. Or if you dont want to take the optic off, put a feeler gauge between the front and back of the plate. I have seen several plates over the last year and they were all the same. Simply look at how thin the web is where the optic lug goes. I would be willing to bet that if you did the test I stated above, you would change your mind about their fit. As for bending, stripped threads, etc., the only instances I've seen were due to improper installation. But I'd be surprised if they didn't stand behind the product and replace any that weren't right. I suppose they could have screwed up and produced a bad batch. Fit was near perfect on every one. I'd be surprised if the Acro or other plates were any different. Well, I've used several C&H plates for RMR and Holosun and none had any slop or other issues. Wasted some material as my machines are Manual and I learned a lot but well worth my time. 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. Unfortunately some of the plates I have mounted for guys were not correct in this dimension.Īll of the plates I have seen or put on myself are sloppy, Every one, even the steel plates. This distributes the energy through the optic and ensures it is not put into one time spot on the optic. 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. The front of the optic has a radius of 2.8188" and the lower lug that engages the plate is only. The Holosun 509t has a dimension that I believe is important. The screw holes should only be holding the plate down, not putting the energy of the recoil into the screws. Having a properly fit plate that is snug in the MOS cut will prevent any recoil force from breaking the screws. I have found some optics loose and once taken off the pistol, found a screw sheared off. 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. the width is not as important but is 1.0025". Third, Dimensions The MOS cut is just over 1.9305" long. *** I order screws from McMaster Carr or other companies who have US made parts*** 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 have had to drill out and clean up several threads from people reusing the screws. These screws are garbage after a single use and please replace the screw if you remove them. Many are 6-8mm long depending on the plate thickness. Second, screws The glock uses a 2.5-.45 thread screw. 6061 will lose its shape if you take the optic off once or twice and retighten it. The manufacturer has no idea of reinforcing critical areas as it is farmed out to the lowest bidder, likely china. Some have even come in already bent due to the 6061 aluminum being too thin even for the packaging or shipping. Many of these plates have bent or lost the shape when the screws are torqued to 13-15in/lb. But each vendor uses a different name for the plate. 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. 6061 alum is garbage especially when thinned out to around. I AM NOT NAMING COMPANIES but many of the plates are garbage.įirst, Material do not be fooled by the name of most plates, the material does matter. Ill primarily be focusing on these two optic plates above and especially the 509 plates. I also happen to mess around in my garage which is a machine shop so know a bit about tolerances and material. 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 personally shot over 12,000 rounds through a G17.5 with an Aimpoint Acro with a steel plate in the last year. 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.
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