Posted: 2/13/2016 9:34:33 PM EDT
| Any reason to mill a slide or better picking up the factory MOS? |
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Reports of supplied screws with MOS gun shearing
Optic too high to have adequate options for BUS Square hole looks like crap compared to custom milled slide Incorrect screws supplied by Glock for some optics If you're cool with all that, go with a MOS gun. Otherwise you can buy yourself a non MOS Glock and have the custom work done for what an MOS gun costs... |
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Reports of supplied screws with MOS gun shearing Optic too high to have adequate options for BUS Square hole looks like crap compared to custom milled slide Incorrect screws supplied by Glock for some optics If you're cool with all that, go with a MOS gun. Otherwise you can buy yourself a non MOS Glock and have the custom work done for what an MOS gun costs... Not sure what this is all about. My 19 MOS with RM06 works great and trijicon suppressor sights work perfect. |
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Not sure what this is all about. My 19 MOS with RM06 works great and trijicon suppressor sights work perfect. Quoted:
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Reports of supplied screws with MOS gun shearing Optic too high to have adequate options for BUS Square hole looks like crap compared to custom milled slide Incorrect screws supplied by Glock for some optics If you're cool with all that, go with a MOS gun. Otherwise you can buy yourself a non MOS Glock and have the custom work done for what an MOS gun costs... Not sure what this is all about. My 19 MOS with RM06 works great and trijicon suppressor sights work perfect. His business mills Glock slides for optics.....just saying... 
The screw sheering issue was due to people using the wrong screws for the RMRs. I've had zero issues with my G17 MOS and Deltapoint Pro. Pretty sure the only optic that doesn't have an iron sight combo to Co-witness is the Deltapoint Pro or Vortex MRDS. Other than that, Trijicon Suppressor Sights seem to work with everything else to achieve a co-witness. |
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Reports of supplied screws with MOS gun shearing Optic too high to have adequate options for BUS Square hole looks like crap compared to custom milled slide Incorrect screws supplied by Glock for some optics If you're cool with all that, go with a MOS gun. Otherwise you can buy yourself a non MOS Glock and have the custom work done for what an MOS gun costs... MOS Glock 19 costs me $550-600. Mill work $200+ |
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MOS Glock 19 costs me $550-600. Mill work $200+ Quoted:
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Reports of supplied screws with MOS gun shearing Optic too high to have adequate options for BUS Square hole looks like crap compared to custom milled slide Incorrect screws supplied by Glock for some optics If you're cool with all that, go with a MOS gun. Otherwise you can buy yourself a non MOS Glock and have the custom work done for what an MOS gun costs... MOS Glock 19 costs me $550-600. Mill work $200+ Actually about $130 at most places. Free for me because I have a mill. |
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Actually about $130 at most places. Free for me because I have a mill. Quoted:
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Reports of supplied screws with MOS gun shearing Optic too high to have adequate options for BUS Square hole looks like crap compared to custom milled slide Incorrect screws supplied by Glock for some optics If you're cool with all that, go with a MOS gun. Otherwise you can buy yourself a non MOS Glock and have the custom work done for what an MOS gun costs... MOS Glock 19 costs me $550-600. Mill work $200+ Actually about $130 at most places. Free for me because I have a mill. Local shop wants $330 to mill and cerakote the slide. Also you mean free for you and your best buddy LeonC |
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Local shop wants $330 to mill and cerakote the slide. Also you mean free for you and your best buddy LeonC Quoted:
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Reports of supplied screws with MOS gun shearing Optic too high to have adequate options for BUS Square hole looks like crap compared to custom milled slide Incorrect screws supplied by Glock for some optics If you're cool with all that, go with a MOS gun. Otherwise you can buy yourself a non MOS Glock and have the custom work done for what an MOS gun costs... MOS Glock 19 costs me $550-600. Mill work $200+ Actually about $130 at most places. Free for me because I have a mill. Local shop wants $330 to mill and cerakote the slide. Also you mean free for you and your best buddy LeonC Local shop is over charging you... By alot. |
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Local shop is over charging you... By alot. Quoted:
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Reports of supplied screws with MOS gun shearing Optic too high to have adequate options for BUS Square hole looks like crap compared to custom milled slide Incorrect screws supplied by Glock for some optics If you're cool with all that, go with a MOS gun. Otherwise you can buy yourself a non MOS Glock and have the custom work done for what an MOS gun costs... MOS Glock 19 costs me $550-600. Mill work $200+ Actually about $130 at most places. Free for me because I have a mill. Local shop wants $330 to mill and cerakote the slide. Also you mean free for you and your best buddy LeonC Local shop is over charging you... By alot. Yeah he does slide milling that I really want done which costs $300. With that and rmr milling/cerakote I'm at $600. |
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Any reason to mill a slide or better picking up the factory MOS? All the negatives I've heard about the MOS Glocks come from the slide millers. Things like: 1) The mounting plate is too thick and places the RDS too high 2) The mounting plate is too thin so the screws strip out. 3) The supplied sights don't co-witness 4) And one of the famous guys saw "Three" RMR's come off at the range. Okay then, How can the plate be too thick and too thin? And, yes, factory Glock plastic sights suck ass. Everyone knows that, and sights are a personal preference. Thanks Glock! You guys kept the costs down and allow me to pick my own sights. And the famous guy who saw "three" RMR's fly off, how about more details? Did those MOS Glock owners use the wrong screws? I bet if I use the wrong sized lug nuts on my car's rim, the wheel will come off too. Oh, and that famous guy is now selling taller "MOS" sights (reluctantly according to him). A few good points about the MOS set-up: 1) Glock warranty stays intact 2) MOS system allows use of various RDS and should allow users to update newer plates if a RDS footprint changes. 3) Some of us can't carry "modified" Glocks. Milled slide = modified, Glock MOS = stock Glock |
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All the negatives I've heard about the MOS Glocks come from the slide millers. Things like: 1) The mounting plate is too thick and places the RDS too high 2) The mounting plate is too thin so the screws strip out. 3) The supplied sights don't co-witness 4) And one of the famous guys saw "Three" RMR's come off at the range. Okay then, How can the plate be too thick and too thin? And, yes, factory Glock plastic sights suck ass. Everyone knows that, and sights are a personal preference. Thanks Glock! You guys kept the costs down and allow me to pick my own sights. And the famous guy who saw "three" RMR's fly off, how about more details? Did those MOS Glock owners use the wrong screws? I bet if I use the wrong sized lug nuts on my car's rim, the wheel will come off too. Oh, and that famous guy is now selling taller "MOS" sights (reluctantly according to him). A few good points about the MOS set-up: 1) Glock warranty stays intact 2) MOS system allows use of various RDS and should allow users to update newer plates if a RDS footprint changes. 3) Some of us can't carry "modified" Glocks. Milled slide = modified, Glock MOS = stock Glock Quoted:
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Any reason to mill a slide or better picking up the factory MOS? All the negatives I've heard about the MOS Glocks come from the slide millers. Things like: 1) The mounting plate is too thick and places the RDS too high 2) The mounting plate is too thin so the screws strip out. 3) The supplied sights don't co-witness 4) And one of the famous guys saw "Three" RMR's come off at the range. Okay then, How can the plate be too thick and too thin? And, yes, factory Glock plastic sights suck ass. Everyone knows that, and sights are a personal preference. Thanks Glock! You guys kept the costs down and allow me to pick my own sights. And the famous guy who saw "three" RMR's fly off, how about more details? Did those MOS Glock owners use the wrong screws? I bet if I use the wrong sized lug nuts on my car's rim, the wheel will come off too. Oh, and that famous guy is now selling taller "MOS" sights (reluctantly according to him). A few good points about the MOS set-up: 1) Glock warranty stays intact 2) MOS system allows use of various RDS and should allow users to update newer plates if a RDS footprint changes. 3) Some of us can't carry "modified" Glocks. Milled slide = modified, Glock MOS = stock Glock Rather than drilling/tapping into the more solid slide, only the small plate is threaded. This means the screws can only go in as thick as the plate. Then, on the flip side, Glock is removing as much material as possible (like most RMR cuts) then adding the plate which adds height to the sight. So both those things make sense. One additional note, many milling jobs leave the RMR with a perfect fit in the slide. This means that, in addition to the screws and pegs holding the RMR at the base, the entire sight sits in a cavity that supports it from the front and the rear. The MOS has a larger area to accommodate more sights but this means that each specific site is likely not retained as well - at least in the direction the slide travels. 
In both these examples, it appears that the sights sit at the same height. The MOS plate has some cuts near the extractor that may be impossible to fit a sight into so its moot on the custom work. |
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I have the 41 MOS and an RMR 06. Have not had it very long, but have been doing red dots on various handguns for quite a while.
We will probably continue to see reports of these optics coming loose. It's not intuitive for many folks to actually try mounting their optic to the plate, before installing the plate onto the gun. This should be mandatory for anyone with the MOS, as the screws will need to be long enough to grab all the available threads (about 3), but not protrude out the bottom at all. I have not checked all of my other plates for the thread size and pitch for the optic mount holes, but I know for a fact that the different makers of the RDS's can use different size/pitch thread for the screws they supply. With this possibility, combined with the limited number of plate threads, I bet we will see some installs with not only the wrong length screw, but perhaps the wrong tread/pitch. It's not hard to crossthread a metric v. sae screw into such a shallow hole, and "feel" a proper bite. Historically, the RDS makers have tended their mounting solutions to lean towards rifle installs, where the pic. mounting plate has more than enough depth to allow for screw length to be not critical. They, as Trijicon has done with the RMR, will need to be on top of things, with the kits they sell. Around 800 rounds into my install where I custom cut screws for optimal length, no issues with the sight departing. More than a few have been 45 Super handloads, which have a "tad" more recoil and slide velocity. I would have preferred that Glock made the mounting pegs on my RMR size plate a little larger. This would help with the shear forces (as noted above), and made return to zero better. I get just a fuzz of left right play in the dot, as compared to my BUIS (trijicon) when replacing the battery. I might get around to glass bedding this situation, at some point. The only "issue" I have had thus far is that Glock managed to ever so slightly cut into the extractor channel when they drilled my slide. You have to look very hard to see it, but I found it when I took a short cut and dripped loctite into the slide holes for the plate, when doing an early install. Some of the loctite seeped into the channel, and I found it on the first removal of the extractor after shooting it a bit. If you use the factory screws as supplied, or apply the loctite to a new screw properly, no problem. I guess they way I see it is that a custom cut slide should be plug and play, especially if your machinist either uses your sight as part of the process or knows what you will be installing. The MOS might be plug and play if you and/or your sight maker have done their homework. Craig |
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The MOS plate being too thin is pure bull.
The dovetail adapters are as thin and aluminum; don't hear about them failing. As Bearbait1 said, test fit the sight and screws to the adapter plate before installing the plate to the gun. That said, the custom milling option is a cleaner install. If you know the sight you like and are willing to marry it, go for it. Use a good shop like ATEi that mills in the bosses for the sight and does not rely on the pocket to index on. |
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One additional note, many milling jobs leave the RMR with a perfect fit in the slide. This means that, in addition to the screws and pegs holding the RMR at the base, the entire sight sits in a cavity that supports it from the front and the rear. The MOS has a larger area to accommodate more sights but this means that each specific site is likely not retained as well - at least in the direction the slide travels. This is exactly what makes a milled slide with RMR exponentially more rugged. In fact, you can slam the RMR on objects for one-handed manipulation and never run the risk of losing zero. To me, that qualifies milling for defensive use and MOS to competition. |
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Here is a gem I found bashing the Glock 40 MOS:
http://www.warriortalk.com/showthread.php?123381-The-MOS-is-a-POS! Basically the OP posts about the MOS cut being too deep, the screws shearing off and his RMR flying away. Turns into 3 pages of bashing the MOS as a design flaw. Unfortunately the OP did not post any pictures, never followed up with Glock's reply and gave zero evidence of this flaw. Yet the Operators that operate operationally on that sight all piled on about the MOS. Why is it unfortunate? Well because it was most likely a bullshit troll post. The OP posted of the issues on 02/18/15. Yes, February 18th, 2015. For a Glock 40 MOS. Why is that date important? Well, Glock wasn't able to launch the G40 MOS until around July 2015. I purchased one of the first G40's in California and believe was one of the first to post pictures of that G40 here on arfcom. I purchased mine on 08/04/15 and the build date was in late July 2015. I don't think any G40's made it into customer hands until late July / earlier August 2015. Sorry, but until I see it in person or photos of a properly mounted RDS flying away from a Glock MOS, I am going to call BS. |
| MOS is easier and arguably cheaper, but it's definitely not better. I have a G40 MOS only because they don't offer the G40 without it. I'd very much prefer a milled slide. I don't like the idea of bolting one thing to another thing and then that thing to the gun. Especially with the only benefit being cross optic compatibility, which is completely irrelevant to me since I don't plan on changing optics at any point. Add on the extra height and sloppy look, and it's a pretty disappointing package. |
| I'm hoping someone is going to release some plates that fit the MOS footprint but have a cavity that would appear to fill the negative space. I understand the cost savings of a flat plate but, since the heights are so similar between MOS and Milled, I would absolutely pay $50 for a plate that matches the curvature/shape of the slide sans where the optic mounts. |