RDS Mount vs. Machined Slide vs. MOS Slide

Discussion in 'Handguns: Accessories, Holsters, and Optics' started by Craig_VA, Apr 5, 2021.

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  1. Craig_VA
    • Contributing Member

    Craig_VA Contributing Member

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    This is to get comments from folks who have used more than one method to mount red dots on pistols. I got my first RDS a couple of months ago, and at the recommendation of a local gunsmith popped a few hundred $ to have my slide machined and the sight mounted directly, instead of under a hundred for a RDS mount.

    So.. From those who actually know, pros and cons of using a mount, hiring a machine shop, or buying a replacement MOS slide?

    Thanks.

    Craig
     
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  2. anothernewb

    anothernewb Member

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    Just mounted a vortex venom on a 1911 with a dovetail mount Thursday. Firearm and RD function was fine. Slide operation seemed unaffected even with soft handloads. The only thing I could say is that with a milled slide, the RDS will be mounded significantly lower. It was a bit of adjustment for me to get used to. but after a few rounds it wasn't bad.

    no question that milling the slide would make the whole thing a little more aesthetically pleasing IMO.
     
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  3. doubleh

    doubleh Member

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    I have a 1911 with a dovetail mounted red dot and really like it plus I have some other pistols with the same mounting system and like them. I have a Sig with the factory milled slide and like it even more. For me the closer it fits like iron sights the better it works.
     
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  4. once0217

    once0217 Member

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    IMO using a rear sight mount is the least favorable option. It leaves the dot too high and there is no way to co witness irons. The MOS system is ok, the plate doesn't allow the threads of the RDS mounting screws much engagement. Also I've read and watched videos of the plate being warped or sheared off the slide completely. If I were to do an MOS system, I would recommend C&H precision plates as they are far superior than the cheap pot metal that Glock uses. Having the slide machined is the best option, but the caveat to that is you're stuck with one style of RDS i.e. if you mill it for an RMR it won't work for a Leupold.
     
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  5. Broccolis

    Broccolis Member

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    I like the MOS approach because dot technology and mounting patterns are most likely to change before I wear a Glock out.
    That being said said you can get a much cleaner look with less opportunities for failure with a dedicated slide cut.... I just don’t like being married to a single optic or pattern.
     
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  6. a2x4bbl

    a2x4bbl Member

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    9CC35856-6079-470A-94C0-BB5A01382A8C.jpeg 7C92565D-4038-45F4-A97F-E3BB5D0D714A.jpeg 579CF3EC-2EE7-4F3E-BFB9-B9FE135DCF88.jpeg Mill the slide . Mounts the sight the lowest . Trijicon and Holosun have the same footprint . Burris has a new Fastfire 4 , same footprint as 2 and 3 with multiple reticles . If you chose MOS C + H makes a far superior plate in every way . It doubles the thread for the sight . Matches the slide better . ED91D17E-B4AF-496D-BCE2-1F488997B09B.jpeg
     
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  7. Craig_VA
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    Craig_VA Contributing Member

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    Thanks,
    To finish my story, after discussion with the machine shop owner, at his recommendation he replaced the factory iron with a suppressor-height sight kit, front and rear, so I have both RDS and co-witnessed iron available.
    Of course, after all that work it cost me another $100 for a new Crossbreed holster to replace my 10 month old $150 Tucker holster, which no longer fit the pistol.

    Craig
     
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