G19 MOS - sight help

[ejewels]

Hey everyone,

Just purchased a new Glock 19 MOS and put 200 rounds through it. It seemed to shoot a little high but not sure if that's just me being away from the range and glocks for a bit.

I'm looking to get an RMR eventually but want to start with sights. Does anyone know if the trijicon suppressor sights will work with the rmr? I've heard in some places they work and some say you need even taller ones. Also, would they still work the same POA/POI?

Another idea is to get regular sights and just run the RMR for recreation. Is it a pain to take off/on or is the MOS system easy like that?

Any suggestions appreciated!

[SamuelBLong]

You will need MOS specific sights if you wish to co-witness with an RMR.

You can get them from Dawson Precision.

The adapter plate used in the MOS system causes the optic to sit up higher than a dedicated mount being milled in, or the other competing mounting system (Unity ATOM).

MOS is not set up as a quick-change solution.... but once you start shooting an RMR, you'll probably find you don't want to shoot without it.


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[ejewels]

Thanks. So cowitnessing with sights is more a safety, backup kind of thing? If I just bought the suppressor height, could I still see through the RMR and use them even if not absolute cowitness?

[SamuelBLong]

Until you build a repeatable presentation using the RMR, it's best to use the irons as a reference to help with tracking the Dot.

As I recall, the Trijicon suppressor height sights will put the notch even with the top of the optic base and doesn't have enough clearance for actual use.

My advise to you, since you're already committed to putting a set of suppressor sights on, is buy the correct MOS sights from Dawson.

They'll function as suppressor sights, but will be ready when you want to drop on the RMR.

https://dawsonprecision.com/dawson-p...r-scope-bases/


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[ejewels]

Ok thanks. One last question, will using sights that high affect POA/POI? Assuming both front and rear are the same height. I want to be able to shoot the gun without the rmr for a bit.

My dilemma is this. I would want regular sights on the glock for non-optic use, but with the rmr I'm told it's important to cowitness. Maybe my question is how important is cowitnessing?

[SamuelBLong]

Well the higher the sights, the more POA/POI differences you're going to find, but... you're going to have zero issues with the Dawson's zeroing, and in my experience using them on a 17MOS during a Super Dave instructor class and in carry / practice since then has been that they are perfectly fine.

I think it's important that you have a co-witness while you are learning to use an optic on the pistol... it gives you a definitive reference point to help index and track the Dot...

Co-witness will also help you if your RMR decides to magically have battery issues... it's not going to help if you somehow manage to mangle/smash the RMR window to the point where you can't see the front sight anymore.




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[aws]

You will need MOS specific sights if you wish to co-witness with an RMR.

I'm running Trijicon suppressor sights and an RMR02 on a G19 MOS for a lower co-witness and it works great. It's not absolute co-witness, which allow me to use the sights as backup but keeps most of the smallish RMR window free of distraction. If the suppressor sights were any taller, it would be distracting while tracking the dot. I hear the Dawson MOS sights are pretty much required for the DP pro (which is taller than the RMR), but for the RMR, it's user preference. YMMV

As I recall, the Trijicon suppressor height sights will put the notch even with the top of the optic base and doesn't have enough clearance for actual use.

They are definitely usable and preferred by me (and some others), but I'm sure some people prefer taller.

Edit: here is a not so great photo, but should work:

[ejewels]

I'm running Trijicon suppressor sights and an RMR02 on a G19 MOS for a lower co-witness and it works great. It's not absolute co-witness, which allow me to use the sights as backup but keeps most of the smallish RMR window free of distraction. If the suppressor sights were any taller, it would be distracting while tracking the dot. I hear the Dawson MOS sights are pretty much required for the DP pro (which is taller than the RMR), but for the RMR, it's user preference. YMMV



They are definitely usable and preferred by me (and some others), but I'm sure some people prefer taller.

Edit: here is a not so great photo, but should work:

Why can't a lower cowitness be used as backup? If the dot went out, wouldn't you just use any sights you see through the window? Maybe I'm just confused of the differences between cowitnessing.

Also, when shooting using just the suppressor irons, do they shoot poa/poi? If I can run the suppressor sights I'd prefer those as they aren't stupid tall like the MOS specific ones.

[aws]

Why can't a lower cowitness be used as backup?

It can - and works great in my experience.

Also, when shooting using just the suppressor irons, do they shoot poa/poi?

They do - spot on at 25 yards.

I think one of the points that SamualBLong was making is that if you are not used to a red dot sight on a pistol (like a Glock MOS) where the sight moves not only with the recoil, but also with the slide (as opposed to a red dot in a rifle), it can be intimidating and require more training to learn to track the dot well. The taller sights might help with that if you don't already have a good index on your draw, as you could index to your iron sights and the dot would be there. You can do the same with the Trijicon sights, but there is just a little less room for error. If you have a good draw and index, you should be fine either way. I did not find it too difficult to use and RMR, but it did (and does) take some practice.

I have had to use the Trijicon sights as backup when the RMR went out during a match, and they worked great. I ended up having to send the RMR back to Trijicon for warranty.

[ejewels]

It can - and works great in my experience.



They do - spot on at 25 yards.

I think one of the points that SamualBLong was making is that if you are not used to a red dot sight on a pistol (like a Glock MOS) where the sight moves not only with the recoil, but also with the slide (as opposed to a red dot in a rifle), it can be intimidating and require more training to learn to track the dot well. The taller sights might help with that if you don't already have a good index on your draw, as you could index to your iron sights and the dot would be there. You can do the same with the Trijicon sights, but there is just a little less room for error. If you have a good draw and index, you should be fine either way. I did not find it too difficult to use and RMR, but it did (and does) take some practice.

I have had to use the Trijicon sights as backup when the RMR went out during a match, and they worked great. I ended up having to send the RMR back to Trijicon for warranty.

ok thanks. On a side note, I noticed at 7-8 yards the g19 with stock crappy sights tended to shoot a little high. Are these guns zeroed at 25 or 50 yards?