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Installing a red dot sight on a Glock 20

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Garndtz

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Discussion starter · #1 ·
Love what you could do with this, but worried about the recoil of a g 20 just throwing the thing off, especially with a 6 inch barrel and hunting loads.

Could a standard drill and tap mount hold it on, or would you need the slide milled?

I would appreciate any thoughts...
 
#2 ·
It's an interesting question because the slide is moving, but that being said, Smith and Wesson revolvers use a screw mount system for their scopes and rings...and Smith makes some BIG revolvers. Most extremely large bore and powerful hunting rifles also use a screw mounted ring, drilled and tapped into the receiver. Another plus is that the mass of the red-dot (assuming something like a Burris Fastfire II) is relatively small compareable to even a small scope. If you could get it to work and not be position overly high on the slide, I think the scews would more-than carry the load.
 
#4 ·
Garndtz said:
Love what you could do with this, but worried about the recoil of a g 20 just throwing the thing off, especially with a 6 inch barrel and hunting loads.

Could a standard drill and tap mount hold it on, or would you need the slide milled?

I would appreciate any thoughts...
Click to expand...

I have seen the Burris Fastfire II mounted without having to cut into the slide on several guns and not had issue but never a 10mm. This might be a great question to ask in the GATE Experts Forum or heck even try calling Lone Wolf they were always very helpful to me.





:50cal:
 
#5 ·
Another resource to contact is Trijicon. They offer the RM44: Glock RMR Pistol Mount which is a screw mount for the RMR to an adapter plate and then mounted to the slide in the stock dovetail in place of the rear sight. They can probably tell you if it has been used successfully on the Glock 20.
 
#8 · (Edited)
miketke said:
This is how someone did it for a g17.
http://www.outdoorhub.com/news/brow...ce=iContact&utm_medium=email&utm_campaign=GlockTalk&utm_content=GT+Newsletter+1
Click to expand...
This is halfway right, but they still screwed up by removing the rear sight notch. TSD is the only place I've seen that really does the red dot installation right, IMO. One Source Tactical sells TSD slides, and TSD slide modifications on Glock slides: http://www.onesourcetactical.com/ad...l.com/advancedcombatglockslidemodificationsoncustomersslide-1.aspx#.T2ftA9Xa9-w

I'm not associated with them in any way, but it's obvious there's a big advantage in dot aquisition when you still have useable iron sights too. Of course, it costs more money to do it "right".
 
#9 · (Edited)
Yondering said:
This is halfway right, but they still screwed up by removing the rear sight notch. TSD is the only place I've seen that really does the red dot installation right, IMO. One Source Tactical sells TSD slides, and TSD slide modifications on Glock slides: http://www.onesourcetactical.com/ad...l.com/advancedcombatglockslidemodificationsoncustomersslide-1.aspx#.T2ftA9Xa9-w

I'm not associated with them in any way, but it's obvious there's a big advantage in dot aquisition when you still have useable iron sights too. Of course, it costs more money to do it "right".
Click to expand...
Amen to everything you wrote about the superior configuration of RDS and BUIS that TSD Combat Systems provides, but let's give a mention to Mark Housel too.

I highly recommend either of these companies to do the best work:
1. Mark Housel with L&M Precision Gunworks, LLC in Prescott, AZ

2. TSD Combat Systems (affiliated with One Source Tactical)
​
Mark Housel spent 18 months doing this work for TSD/OST as their exclusive provider until his contract ended. He has his own business now to continue this work and other gunsmithing. Mark would be my first choice if you want to have a Glock OEM or Lone Wolf slide milled and the RMR with co-witnessed BUIS installed.

TSD Combat Systems can talk to you about their exclusive AquaTerra™ line of custom G17 and G19 slides and match barrels with the RMR and BUIS system installed. They can mill a Glock OEM or Lone Wolf slide you provide as well for the G17, G19 or any other Glock pistol model.
 
#11 ·
After you shoot 200 rounds or so you pick up the dot real fast.. and for $500. you can do alot of practice. I have never seen a g20 milled out and what it would do to the strength of the slide when shooting high powered rounds over time. mine is more of a range and hunting gun. I use the g29 and kimber eclipse 10mm for self defense.
 
#15 · (Edited)
_The_Shadow said:
Take a look at this operation...
http://www.bayoushooter.com/forums/showthread.php?73808-New-slide-milling-option
Click to expand...
That is fascinating work! I knew Mark Housel was working on some cutting-edge ideas for mounting optics on pistols, but that is the first time I've seen those CAD renditions. Very cool, thanks for the link.

The civilian market in these optical sight systems for everyday CCW is taking off. In 5-10 years it wouldn't surprise me if every major pistol maker offers models of RDS-ready pistols. If Glock doesn't venture into this market, the competition will leave them behind.
 
#17 ·
Yondering said:
This is halfway right, but they still screwed up by removing the rear sight notch. TSD is the only place I've seen that really does the red dot installation right, IMO. One Source Tactical sells TSD slides, and TSD slide modifications on Glock slides: http://www.onesourcetactical.com/ad...l.com/advancedcombatglockslidemodificationsoncustomersslide-1.aspx#.T2ftA9Xa9-w

I'm not associated with them in any way, but it's obvious there's a big advantage in dot aquisition when you still have useable iron sights too. Of course, it costs more money to do it "right".
Click to expand...
TSD does a quality mount. I have a Lone Wolf slide for my G21 that they did this on back when they were sourcing their slides from Lone Wolf. Had some problems with the slide itself, but their work was quality. Shouldn't be a problem if you use the G20 slide.

Lone Wolf will also do a "slide melt" mount that is similar.

I've put ~ 1000 rounds through mine - granted .45 not 10mm, but no shift in zero and I have to say I wish I'd done it sooner. I find target acquisition to be much faster, and I'm more accurate with it too.
 
#18 · (Edited)
ArmyDoc said:
Lone Wolf will also do a "slide melt" mount that is similar.
Click to expand...
When I was shopping around for a company that could mill my Glock OEM slide, I learned the Slide Melt service from LWD is unavailable for OEM slides. I believe that is still true (see statement on their web site currently).

There is another important distinction in the quality of craftsmanship that Mark Housel or TSD/OST provide. The last time I checked, the LWD Slide Melt makes the slide cuts straight across, whereas Mark Housel and TSD/OST carefully curve the forward cut to exactly match the contour of the RMR base.
 
#19 ·
You all are very welcome for the link, very educational and functional info!
I was never a big fan of electronic sights...failure does not equal sucess! Laser sights in addition to the standard sights are better for defensive situations in my opinion.

However electronic sights in competition or target shooting have their purpose!
 
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#20 ·
_The_Shadow said:
I was never a big fan of electronic sights...failure does not equal sucess! Laser sights in addition to the standard sights are better for defensive situations in my opinion.
Click to expand...
I tend to disagree about lasers, having found them pretty much useless when they are needed, but quite a novelty otherwise.

The TSD type of setup eliminates any concern about failure of the red dot sight, because the iron sights are still in place and fully functional. That's my problem with these sight mounts that replace the sight; when the battery dies, you've got no sights left.
 
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