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 Help needed, removing M&P 40 rear sight
blackgunfun  [Team Member]
1/30/2010 9:13:10 PM
Can't get the rear sight off of my M&P 40. I've removed the set screw and tapped it with a brass punch...won't budge.

What am I missing / doing wrong ? Don't wany to whack on it any harder and certainly don't want to f*** something up.

Any and all help appreciated.. Thanks.
SSeric02  [Team Member]
1/30/2010 9:51:44 PM
I'm pretty sure I've read S&W uses a hydraulic press to fit the sights on those guns and they are in there hard. You'd probably ought to get a MGW sight tool from Brownells.
blaznhot_23  [Member]
1/31/2010 12:30:33 PM
Originally Posted By blackgunfun:
Can't get the rear sight off of my M&P 40. I've removed the set screw and tapped it with a brass punch...won't budge.

What am I missing / doing wrong ? Don't wany to whack on it any harder and certainly don't want to f*** something up.

Any and all help appreciated.. Thanks.


which way are you tapping ???

If I'm correct ...looking at the slide from the rear you should be tapping left to right. Installation the reverse. Just be careful of the plunger spring under the sight
Wash-Ar15  [Team Member]
1/31/2010 1:57:42 PM
Originally Posted By blaznhot_23:
Originally Posted By blackgunfun:
Can't get the rear sight off of my M&P 40. I've removed the set screw and tapped it with a brass punch...won't budge.

What am I missing / doing wrong ? Don't wany to whack on it any harder and certainly don't want to f*** something up.

Any and all help appreciated.. Thanks.


which way are you tapping ???

If I'm correct ...looking at the slide from the rear you should be tapping left to right. Installation the reverse. Just be careful of the plunger spring under the sight


that it the correct way .you may just need to hit it harder. or get a site pusher.
blackgunfun  [Team Member]
1/31/2010 5:43:21 PM
Thanks for the help. I'll report back with results.
cookiemonster  [Member]
1/31/2010 7:50:22 PM
FWIW I just changed over to night sights on mine tonight...brass punch with dead blow hammer did the trick. The new front needed a bit of filing and polishing to persuade it to go in. Other than that not a huge deal.
TeamPrecisionIT  [Member]
1/31/2010 8:46:33 PM
They go on a certain way and as mentioned previously, looking at it from the rear it has to go out to the right and then you have to put the new sight the same way. The dovetail is tapered and this causes it to have to be put in (and taken off) like that. Seriously, though, be careful with the FPS spring.

Damian
HBAR16  [Team Member]
1/31/2010 9:09:30 PM
Yup there is a taper. I used a sight pusher to put my Ameriglo night sights on. Was about two years ago and can't remember whether the taper is left-right or right-left but there is definitely one. If the sight isn't moving one way... take a deep breath and try the other side.

And yeah watch out for the misc little parts that come shooting out from under the sight... eye pro is a good call and maybe using a ziploc over the slide while doing the work just in case you miss them.

Originally Posted By TeamPrecisionIT:
They go on a certain way and as mentioned previously, looking at it from the rear it has to go out to the right and then you have to put the new sight the same way. The dovetail is tapered and this causes it to have to be put in (and taken off) like that. Seriously, though, be careful with the FPS spring.

Damian


blackgunfun  [Team Member]
1/31/2010 10:31:25 PM
Tried again, no luck. I'll quit while I'm ahead and take it to a smith.

Thanks again for the help.
SSeric02  [Team Member]
1/31/2010 10:58:32 PM
Originally Posted By blackgunfun:
Tried again, no luck. I'll quit while I'm ahead and take it to a smith.

Thanks again for the help.


Just a piece of advice, as all "smiths" aren't created equal is a lesson I learned the hard way years ago having new sights installed on my old Kimber, make sure whoever you hand it over to really knows what he's doing and has the propper tools to do it. In my case, my brand new Novak nights sights got installed, but they all had some nice round dents applied courtesy of a "smith" who did use the right tools.

Honestly, having purchsed one to use on my SIGs, the MGW sight tools are very easy to use and make do it yourself installs a piece of cake. If you're only intending to do it the one time, I'm sure you can sell the tool here in the EE or maybe on the M&P Forum and recoup much of your cost in it. Just something to think about.
blackgunfun  [Team Member]
1/31/2010 11:46:14 PM
Hmmm...... I guess another tool in the box can't be a BAD thing.

Thanks.
SSeric02  [Team Member]
2/1/2010 12:02:37 AM
Sure, here's a couple of threads that may be of interest to you on the M&P forum:

http://mp-pistol.com/boards/index.php?showtopic=23577

http://mp-pistol.com/boards/index.php?showtopic=21984
blaznhot_23  [Member]
2/1/2010 11:07:26 PM
Originally Posted By blackgunfun:
Tried again, no luck. I'll quit while I'm ahead and take it to a smith.

Thanks again for the help.


I wouldn't give up just yet....

Give the sights a good dose of Break Free CLP. Let it soak in overnight. If you don't give a hoot about the stock sights use a brass or even a steel punch. They should come out. I used a 40oz ball peen hammer and a brass puch to remove my old sights. When installed the new ones I used the same hammer but a nylon punch. Some sights need a little filing/sanding to make them fit just right.