C+H Optics MOS Adapter Plate for G17 G19 MOS | Compatible with Trijicon RMR/SRO, Holosun 407C/507C/508C/508T | Made in The USA

So Glocks are great, and having a factory optic cut is awesome. The Glock MOS system suffers because the optic plates suck. Your OEM plates are badly molded metal, often don’t sit flush, lose threading, and place the lion’s share of stress on the screws holding the optic to the plate. CHPWS solved this issue entirely. Hands down their plates are the best engineered solution, and they really have solved every possible issue with V4. The optic fits snug on the plate, and has to be pressed onto the posts; that’s some amazing part tolerance. The T-posts give you a total of four posts for the optic to hold onto in recoil, and are removable should you somehow strip or mangle one. It’s unlikely you’ll strip the post, but should you snap off a screw head, the posts have a hole in the bottom allowing you to put a drill bit under the screw and push it out. The plates are thinner than factory, they hold the optic on the front and back, and short of milling a slide are the best option out there. The plates ship with three screws for the optic so you have an extra, and stainless screws to mount the plate on the slide. Unlike the factory plates, CHPWS plates pretty much hold zero if you have to remove the optic for a battery change. It won’t be a perfect zero, but your impact will be within an inch or so of where it should be. That’s good enough to allow you to swap a dead battery without having to run to the range immediately. Factory plates can be off by four to five inches after removing the optic. So buy this thing if you have an MOS Glock. It’s not even a question.

Great product!

Perfect fit. So far no issues.

Great fitment, mated perfectly to Mr. Glock, happily secures a Holosun

First, the screws for mounting the plate to the slide are missing. Thankfully I have multiple mos screws that are the same spec, so mounting the C&H plate was possible without having to call for replacement. The thread locker was missing, but I have thread locker that met C&H’s recommendation. The T-nuts did not sit flush in the recess on the plate. I had to file the excess metal on the plate to allow the T-nuts to sit flush. I finally got the plate mounted flush. Second, labeling was absent on the holosun and rmr screws. I had to go online and make sure I had the right screws for my holosun 507c optic. The QR scan led to a series of instructional videos that were sub par. When C&H is telling you during the instructions that you may have to modify screws and the plate to get the right fit that is a red flag. At this price point everything should fit right the first time. I should not have to machine your screws or plate. Third, I mounted the holosun to the plate. There is a gap under the optic at the lugs. I can see light from the lugs to the mid point on the optic. I used I torque tool and set screws at 10 lbs as instructed by C&H. I took optic off and inspected the lug holes on optic. The optic is not the problem. The lugs on the plate are the problem. I used digital calipers to measure each lug of plate. The right lug is higher than the left, which means I will have to file the lug to get my optic flush. Finally, this company bolsters precision, reliability and easy installation. This product is anything but precise, reliable, or easy to install. Save yourself the time, trouble and money. I placed my mos plate back on my glock 19. I do not care for the gap between the front of my optic and the slide when using the mos plate, which lead to this purchase. That was my only problem with the mos plate. I got caught by the advertising that a tighter fit from the C&H plate would add to the security of the optic. Maybe I got the lemon.

So much of my time would have been saved if they just printed the name of the optic each screws were intended for on the bag as well as a torque setting. It comes with 5 different bags of screws and they are only labeled by their size and length. I shouldn't have to scan a QR code and watch an installation video for information on torque settings or which screws to use. I had to bring up the manufacturers wesbite just to find out what my "4-40x.320 FH(B)" screws were for. PLEASE just print RMR 12-15 in-lbs and that is ALL I would have needed to make this product a perfect 5 out of 5. You are already taking the time to separate all of the screws and putting them in their own packaing, just mirror what is on your website on the label and it would save a lot of headache for your customers. Aside from that, the plate is fantastic quality and I am thrilled with the product. Highly recommend it and I'm glad it is a plate I can depend on compared to the crappy stock MOS plates that Glock supplies. Just label your bags with the optic name and print the torque specs on the product/packaging.

No better replacement plate for the Glock OEM plate!

Perfect fit, very good design. Much better than the Glock plates. Trijicon RMR mounts prefect, I now have 2. The price is good