Glock MOS, hit or miss?

[MTMilitiaman]

If one was contemplating trying a red dot sight on a defensive handgun, and was already confident in and proficient with the Glock, does Glock's MOS system provide a convenient and practical option? I have heard some stories of optics rattling loose or even flying off, apparently some confusion over which screws to use, and other issues when the system first came out. Now that it has been on the market for a little while, has Glock maybe addressed some of these issues and is there a general consensus on whether the MOS system is a workable alternative to getting some slide work done? Or is one probably still better off ponying up the $200 to get the slide milled?

 

[tarosean]

I bought one when they were first introduced. If I had to do it over again I would have had the slide milled as the sight will sit lower.

In order to fit my Trijicon it required me to file down the screws, or find new ones, so they were not lifting up the plate system. I just filed them down.

My DPP fit without issue though. I haven't had any issues with screws backing out but I do always use locktite.

Not sure how it would confuse someone??

 

[JR24]

I dipped in the red dot pool myself with a MOS and a Vortex Venom.

Had absolutely no issues with the mounting and it stayed tight through a few thousand rounds and being carried for a month or so.

Ultimately I decided that I didn't like how even on the brightest setting I lost the dot on sunny days and had to go to irons anyway, that plus the extra dodad on top made me have to change some things about my holster ride height and cant so I went back to irons.

In a few generations I'll probably revisit red dots as my eyes age further, but I do feel it is the system of the future and will be pretty much standard not too far in the future.

 

[Master Blaster]

I have the G41. I mounted a Burris FF III on it with the recommended screws, and no issues. So far about 1500 rounds I reload so it's been a mix of 185 and 200 gr bullets. I did fire some 200 lswc with 4.5 gr of (light target load) bullseye and no cycling issues. I like the red dot, I am 58. It takes a little practice for rapid aquisition..

 

[Havok7416]

I have a G19 with a Burris on it. Within the last few months I noticed the screws were backing out. I tightened them but haven't had the opportunity to run the gun properly to check them yet.

I like the whole setup even though I've never cared for Glocks generally. If you're interested, Dawson Precision makes irons that co-witness with many popular red dots.

 

[TonyAngel]

I normally like to get the dot sight as low to the axis of the bore as possible. On the other hand, the MOS system has the advantage of your being able to go with a different brand of site later.

 

[Texas10mm]

When mounting a red dot use Vibra-Tite. It's what was recommended to me on the Canik forum and it works!

https://smile.amazon.com/gp/product/B0088YEGXM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

[Olympus]

I've got a G34 with a Burris back when they were first introduced and it has been perfectly fine for quite a few years now. I like it so much that I have a G45 MOS that should be arriving tomorrow that I will be installing an RMR on when the funds get built back up. I would definitely recommend the MOS.

 

[Trey Veston]

Bought the Gen 5 MOS and mounted a Burris Fastfire III. Made it very accurate in my hands and a great range shooter. Also had to file down screws to prevent the lifting and used loctite.

With the optic on and the suppressor height sights, it totally changed the characteristics of the gun from a nice carry gun to something that was unwieldy and snagged and just felt like a duty weapon rather than a CCW piece.

I've since took everything off and converted it back to original form for carry. Now that the P365 is my new magical carry gun, I may put the optics back on and enjoy it as a range toy.

 

[Viper1357]

I also got my G35 MOS back when they first came out and opted for a Trijicon Dual Illumination RMR-05G and Dawson RMR co-witness height night sights. I also had to shorten the RMR mounting screws to fit the MOS plate flush, but it wasn't any big hassle as it was easy to see how much to remove when test fitting/assembling. I too used loctite, and have had no issues with it coming loose thus far. It's a nice home protection and range gun, but not at all practical to carry very easily, for me anyway. It worked out well, and the gun and optics/sights are very reliable and accurate.
I would also recommend a Glock MOS, but there may be better choices available now that around weren't five years ago.

 

[sparkyv]

Use BLUE threadlocker.