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Damn. My rear sight broke....

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Pantera Mike View Drop Down
International Auto Mag
International Auto Mag


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pantera Mike Quote  Post ReplyReply Direct Link To This Post Topic: Damn. My rear sight broke....
    Posted: 27 Sep 2018 at 4:33am
So there I was enjoying my second Auto Mag range trip this week, letting a friend shoot it for the first time. After about a dozen rounds of SBR ammo, he asks me, “Where did the rear sight go?”

What followed was a mad scramble, and we came up with this:


The rear sight windage screw sheared off where the threaded portion joins the base of the head, and the ball bearing detent arrowed off into the grass never to be found again. 

When I was speaking to the owner of CH4D dies a few weeks ago, he mentioned to me that his .44 Auto Mag broke the rear sight (he didn’t specify how exactly) a half-dozen times in only a few hundred rounds!  Is this really a common failure? What do other people do to prevent this?

And does anybody have an extra rear sight windage screw lying around?

Sigh.....



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TankMan View Drop Down
Baby Auto Mag
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TankMan Quote  Post ReplyReply Direct Link To This Post Posted: 27 Sep 2018 at 5:39am
Why would the head of that screw shear off?? There's no direct mechanical action against it when the pistol is fired, is there? The only other thing is there some loose part that can accelerate then impact  the screw and cause the failure. I need to look at my pistol.
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Pantera Mike View Drop Down
International Auto Mag
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pantera Mike Quote  Post ReplyReply Direct Link To This Post Posted: 27 Sep 2018 at 6:42am
Here is a photo of the broken screw. Amazing quality considering it was taken with an iPad....



I could envision a scenario where the screw seizes in the hole, then when an attempt is made to adjust the sight, the head shears off. But mine turned freely. 

Hmm.....

Here is what a good screw looks like. The detent is almost microscopic....


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Travis Morgan View Drop Down
International Auto Mag
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Travis Morgan Quote  Post ReplyReply Direct Link To This Post Posted: 27 Sep 2018 at 6:58am
Rear sight takes quite a pounding as witnessed in this video. 
If the sight is flopping around that much just imagine what is going to happen to a barrel extension mounted scope on an Automag over time, but Jurras and many others did it for years.




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TankMan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TankMan Quote  Post ReplyReply Direct Link To This Post Posted: 27 Sep 2018 at 7:07am
Ah I get it. The hole machined out for that detent bearing weakens the screw. Too bad the head disappeared, if it were mine I'd try to silver braze it back together though without seeing it not sure that's even possible.

Jerry
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paul v. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote paul v. Quote  Post ReplyReply Direct Link To This Post Posted: 27 Sep 2018 at 7:08am
I've also had similar experiences with the rear sight. Somewhere over 500 rounds or so, the windage screw broke and about a year later the elevation screw flew somewhere into outer space on my early model 44 Pasadena. I believe these parts are still available for about $40.00 each at the New Auto Mag site. I'm not sure what went wrong as I methodically check for loosened screws, over tightened screws etc. The Auto Mag has a relatively violent mode of operation and it's parts are tested to their limits at every shot.
Paul v.

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TankMan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TankMan Quote  Post ReplyReply Direct Link To This Post Posted: 27 Sep 2018 at 7:19am
I suppose I should add these screws to my growing spare parts collection...I don't suppose anyone has a redesigned more robust version...?

Jerry
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Pantera Mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pantera Mike Quote  Post ReplyReply Direct Link To This Post Posted: 27 Sep 2018 at 4:18pm
Patrick at the New Automag company came through, hurricane notwithstanding, and a new (well, new old stock) replacement screw is on the way to me now. Cost was $48.50 plus shipping....Thumbs Up
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richie_b View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote richie_b Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 3:27am
Originally posted by Pantera Mike Pantera Mike wrote:

Patrick at the New Automag company came through, hurricane notwithstanding, and a new (well, new old stock) replacement screw is on the way to me now. Cost was $48.50 plus shipping....Thumbs Up


Outstanding service! I was going to suggest Kensight, as I've bought parts for my Hardballer rear sight from them. But original is hard to beat!  Wink

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tgt40 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tgt40 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 2:27pm
Kensight:  Great products, terrible customer service.

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