Ruger Mark III rear site misaligned while firing

[Jason]

While I was out at the range the other day the rear sight shifted over to the left a good 1/4 inch while I was firing. The rear sight isn't loose just misaligned. The middle screw is for sight adjustment and the screw to the left is a set screw that goes all the way to the bottom of the site. The rear sight is in a dovetail grove. I'm pretty sure the purpose of that set screw is to lock the sight in place. What would be the best way to realign this? I know a special press tool is used to swap glock and sig sights, I don't have one of those. I'm thinking if I removed the set screw and use a small soft face hammer to tap it back in place it should work but thought I ask around before smash my rear sight up.

 

[Cuda444]

These guns are NOTORIOUS for this. Mine did this, as did a brand new one that belongs to a friend of mine. I fixed mine by pulling the set screw and gently tapping a wooden block with a hammer to loosen it up. YMMV

 

[JayW]

I'm interested in responses here as well. I own the MK III Hunter. Not sure if the picture here matches my rear sight. Mine has the V notch.

Anyway, I want to adjust the rear sight as well as it is off. There is not a lot of information on doing it. Guess I'm spoiled with having easy access to info on the Internet. Without it I was planning on putting it on a bench rest at an indoor range and just start turning screws.

Any help would be appreciated. Although I'm sure this is not a very popular subject.

 

[Jason]

I'm interested in responses here as well. I own the MK III Hunter. Not sure if the picture here matches my rear sight. Mine has the V notch.

Anyway, I want to adjust the rear sight as well as it is off. There is not a lot of information on doing it. Guess I'm spoiled with having easy access to info on the Internet. Without it I was planning on putting it on a bench rest at an indoor range and just start turning screws.

Any help would be appreciated. Although I'm sure this is not a very popular subject.

The one is the picture is a Mark III hunter with the V notch. I've tinkered with the sight adjustment in the past but have it set somewhat neutral now. At 50 feet you have to go 6-7 clicks in order to have a noticeable change. I really only like the fiber optics sights when I'm outdoors. Indoor not so much, I've debated on picking up the stock Ruger competition sites.

 

[jar]

I fixed mine by mounting an ultradot.

 

[mac1911]

http://www.rimfiresports.com/merchant.mv?Screen=PROD&Store_Code=RSC&Product_Code=VC2TL

I replaced my 22/45 with one of these, I bought the 22/45 for cheap as the sight was broken and prvious owner beat the snot out of it. no machanical ability at all.

It claims to be for bull barrels only? I also have the MKIII hunter. the sights are constantly comeing loose. I have not or do not shoot it enough to care.

From my exsperience with the MKIII. Factory sights aint to good unless you pick a distance and leave it alone. counting clicks to get it back to where it was turns out to be pointless. I bought a cheap wal mart red dot for it. have yet to mount it.

I paid 379.00 for mine at Fourseasons when they first came to mass. I can not bring myself to dish out 65+ for a gun I do not shoot much.

 

[highlander]

I believe Millet makes a rear sight for the Ruger 22 pistols. I have their rear sights on 3 of my Ruger revolvers and have been quite pleased with them.

 

[Greg Derr]

This can easily be fixed. On top of the sight the small allen head is the "set screw" make a small detent with a drill. This will hold the sight in place. Get the sight in the right location, tighten the allen enough to make a mark in the dovetail, then drill. Greg

 

[Jason]

http://www.rimfiresports.com/merchant.mv?Screen=PROD&Store_Code=RSC&Product_Code=VC2TL

I replaced my 22/45 with one of these, I bought the 22/45 for cheap as the sight was broken and prvious owner beat the snot out of it. no machanical ability at all.

It claims to be for bull barrels only? I also have the MKIII hunter. the sights are constantly comeing loose. I have not or do not shoot it enough to care.

From my exsperience with the MKIII. Factory sights aint to good unless you pick a distance and leave it alone. counting clicks to get it back to where it was turns out to be pointless. I bought a cheap wal mart red dot for it. have yet to mount it.

I paid 379.00 for mine at Fourseasons when they first came to mass. I can not bring myself to dish out 65+ for a gun I do not shoot much.

Loctite has kept the front site in place for me. It used to loosen up every two hundred rounds. I did also mount a BSA red dot to try it out. It was my quick fix over replacing the sights. It bumped my bulls eye scores almost 50 points over the stock sights.

 

[Jason]

This can easily be fixed. On top of the sight the small allen head is the "set screw" make a small detent with a drill. This will hold the sight in place. Get the sight in the right location, tighten the allen enough to make a mark in the dovetail, then drill. Greg

Hmm I would have figured Ruger would have done that from the start. I got the sight realign with a hammer and wood block so for now all is good. Thanks for help everyone.

 

[JohnFH]

Mine was loose in the box, I centered it up, cleaned everything up with alcohol blue lock tite and then when tightening the set screw, tap the end of the screw driver with a nylon hammer to "set" the screw.

been fine for over a year now

 

[JohnDam]

I have the same problem with my Ruger III 22/45. It is a good half inch out of center. I am going to give the hammer and wood block a go.