Installing an after market rear sight - MP-Pistol Forum

Installing an after market rear sight

This is a discussion on Installing an after market rear sight within the MP SHIELD Pistols forums, part of the Smith & Wesson MP Forum category; Hi. I am relative new to M&Ps, always been a Glock guy so bear with me please....when taking out the stock rear sight on a ...


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Old March 23rd, 2017, 03:46 PM   #1
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Installing an after market rear sight

Hi. I am relative new to M&Ps, always been a Glock guy so bear with me please....when taking out the stock rear sight on a Shield how do you keep the cap and the spring underneath from flying out and landing who knows where, never to be seen again? And can you do the uninstall/install with the slide in a padded vice using a brass or nylon punch and hammer? I have seen the universal sight remover on Amazon that everyone raves about but if I can save $80 that's fine by me. I prefer doing these things myself. Thanks.
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Old March 23rd, 2017, 07:30 PM   #2
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Welcome to our little corner of the web!

First a little disclaimer, I haven't removed the rear sight on my Shield, so I'm not positive its the same as the full size/compact, if it is...then this info is accurate.

As you drift or push the sight to one side, do it a little at a time, which hasn't been a problem in my experience in full size pistols. You will see the cover being exposed, and you can just hold it down, or put some duct tape on it to hold it in place, the spring is very light so it isn't a big deal. You could also take a little scrap of wood to wedge it in place as you remove the sight. Again, that spring is very soft, so its easy to retain the cover.
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Old March 23rd, 2017, 07:54 PM   #3
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I haven't done my Shield (let a gunsmith with a good sight pusher do that), but I have done my full size. Pushing it off left to right (your left if you were holding the gun), that thing is over on the right side. By the time you get it that far to the right its basically loose to the point you can probably slide it out the rest of the way with your fingers. It will still be covering that cap and holding it in place. You've got control over the situation at that point.
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Old March 24th, 2017, 01:53 AM   #4
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I would not use a cheap Amazon sight pusher; the slide-rail interface is fairly thin on the Shield. More than one lad has cracked their Shield slide attempting to remove a rear sight with a poorly supported slide.

The ridges on the front / rear surfaces of the Shield sights are used to guide their factory installation when using a hydraulic arbor press to smoothly and accurately position them. These same ridges are why the Shield sights, particularly the front sight can be difficult to remove.



Proper sight pushers like this one with dedicated model specific rail support inserts will cost more than the Shield.



IF you decide to use a punch method, a few tips.





Tape protect both the slide surfaces and the protected vise surfaces; do no use soft vise inserts as they will be absorbing some of the force you are trying to deliver with your hammer-punch method.

A good quality hex wrench so you don't strip the fastener in the rear sight; note they have red Nylok (not Loctite) on the threads.





You will see the polymer spring disc as you are removing the sight; control it in place by leaving the punch across it as the final tap displaces the sight, just let the sight fall off to retain control of the disc if you are worried about it getting away. On re-installation of the rear sight is when
you need to be careful to make sure the disc remains correctly seated until held captive by the sight; a special dove-tail polymer tool is available (but not required) to perform this task; the tool is displaced as the sight is tapped back in.



Tape the front of your punch when installing nice sights so you can limit the brass marring its surface.



Tools to remove the Shield sights: note the size of the brass punch, its tip precisely shaped with a file to match the rear sight base for maximum efficiency. The polymer sight-retaining tool is shown as well. Your $80 will be better spent on proper punches etc.



It couldn't be more clear how you need to proceed. You are welcome.

Caution: Pseudo-science and / or amateur photos may be embedded in this post.

Last edited by mp9werks; March 24th, 2017 at 02:12 AM.
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Old March 24th, 2017, 06:51 AM   #5
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For anyone concerned... and i`m not dissing mp9werks,
the man is a very knowledgeable person, contributes tons in here...
But i will totally disagree with sight pushers that clamp inside the of the slide rails.

These types of sight tools, that hold the slide in the sight tool by using the slide rails to clamp it securely the slide into the tool, ARE KNOWN to crack the slide rails...especially M&P shields. I myself, will only use a sight tool that only clamps each side of the slide within the tool, NOT the rails. Especially if the sight tool part is only clamping a very short area of the slide. If these tools had longer holder tools, that would go full length of the slide rails, i wouldn`t have as much of an issue seeing people use them. But as short as they are, you`re going to get yourself into trouble using these type of sight pushers, because of how hard these sights are to get moving out of the dovetail. Use at your own risk.

And if you have a gunshop/gunsmith do your sights for you, i HIGHLY recommend that you break the gun down, INSPECT the internal areas of the slide AND the frame, BEFORE YOU LEAVE THEIR PLACE OF BUSINESS...! It is best to take pictures of your gun and internal parts of the gun BEFORE you take it to your local guru`s. Also INCLUDE your serial number within the pics.

You would never believe the horror stories i`ve seen and heard over the years.
Be very cautious with sight pushers, or who you let work on your guns.
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Old March 24th, 2017, 08:21 AM   #6
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^^^
For those that don't know the difference, the MGW Pro Sight pusher secures the slide with specific inserts into the slide rail recess for each gun. Importantly, the sight pusher shown also has 4 external delrin adjustable support blocks to align with the internal rail support system...as well as an adjustable delrin block fitted on top of the slide surface....all these design elements work in concert to prevent slide torque rotation when removing / installing sights. That's why they are best.

Last edited by mp9werks; March 24th, 2017 at 08:30 AM.
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Old March 24th, 2017, 09:51 AM   #7
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Handgun Sight Pusher Tool Universal for 1911 glock sig springfield and others | eBay

This is the one I use. It provided full support for the slide and I've used on for M&P Shield(s), Glocks, XDs and P320 guns.
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Old March 24th, 2017, 11:39 AM   #8
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I have removed and installed both front and rear sights on probably a dozen or so Sheilds. I fully concur with both of M&P 9Werks comments. I own the B&J Universal Sight Tool, the Maryland Gun Works (MGW) M&P Sheild Sight Tool, the MGW M&P Sight Tool and I finally wound up buying the MGW Pro Sight Tool and have also acquired all of the shoes for the various pistol models for use with the Sight Pro. The B&J tool is not very user friendly and, in my opinion, does not support the slide well. The pistol sp did tools and the Sight Pro tool from MGW work very well. All three offer excellent slide support and will make the job much easier. Used ones come up for sale occasionally on this site.they go for 80 to 90 dollarrs and usually sell very quickly. You could maybe buy a used one. Replace your Sight and the re-sell it and probably not have to take much of a beating, if any, on what you paid for it. Just a thought.
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Old March 24th, 2017, 03:33 PM   #9
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Werks to the rescue!
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Old March 24th, 2017, 04:52 PM   #10
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Wow, thank you so much! That is indeed duty above and beyond. Super photos, super detail. I am a bit confused however on the choice of sight pusher.....I have heard only good things about the Universal sight pusher sold on Amazon for around $80. I would much prefer to use it than a vice/punch routine. I ordered the Universal a few days ago and it hasn't arrived yet. If it is has the potential for cracking my slide, yee gads, I don't want it and I'll send it back. Thoughts?
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Old March 24th, 2017, 04:55 PM   #11
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Thank you very much. So then where does the Universal sight pusher fit into all this? Is it safe to use, not safe? I haven't receive it yet from Amazon and can always send it back for a refund.
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Old March 24th, 2017, 04:57 PM   #12
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Yes, this is the same one I have on order from Amazon. So bottom line, is it safe to use on the Shield slide or not? Thanks.
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Old March 24th, 2017, 05:00 PM   #13
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Thanks. Sounds like I should be worried about using the Universal sold on Amazon. Oh boy. One thing I don't need is a cracked slide.
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Old March 24th, 2017, 05:13 PM   #14
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Catastrophic shield failure!!!!!! Aaahhhhhh

Here's a guy that used an MGW sight pusher and cracked his slide. Comments? Thanks.
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Old March 24th, 2017, 05:17 PM   #15
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https://www.glocktalk.com/threads/m-...rning.1492828/

Here's another vote of no confidence The Ameriglo sure looks like an MGW pusher to me.
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