Rear sight questions (M&P40)

[LeLynn]

Hello everyone. I have a question about the rear sights for my new M&P40. I recently installed an Apex hard sear and REALLY like the differance it has made as far as overtravel on the trigger as well as the reduction in trigger pull. It did not however remove the gritty feeling the trigger has, so I just placed an order for an Apex striker block kit. In order to install the striker block kit I'll have to remove the rear sight. I have seen how it is done with a padded brass punch (padded with masking tape or some such item). I am not sure how I will get the rear sight re-installed in exactly the same place. The gun currently shoots right on target so I would like to get the sight back in the propper location. I am considering an adjustable rear sight, just to make things a little easier. I would like to avoid repeated trips to and from the shooting range to make minor adjustments to get the point of aim where it belongs. So my qustion is this: Is there a way to guarantee I get the sight EXACTLY repositioned after removal? If not, is there an easy was to adjust the sights at the range without a $115 sight pusher? If the answer is no to both of these questions, can someone recommend a good, high quality adjustable rear sight? I am a little concerned that an adjustable sight may loose it's zero and require repeated re-adjustments over time. Is this true of adjustable sites? Thanks for your time I hope someone will be able to help me, to prevent me from either repeated range trips or buying an expensive sight tool that I will more then likely use only 1 time. Thanks again.

 

[The Lone Haranguer]

I wish I still had my M&P. :banghead: IIRC the rear sight is held with a set screw. Loosen this screw and it should only take minimal effort to slide the sight out of the groove. It might take a little "persuasion" with a non marring punch or small hammer, but should not need a sight pusher. Devise a method of marking the sight or slide so you can put the sight back in the same position.

As for aftermarket adjustable sights, they are expressly designed to not lose zero under the motion of the slide, but with few exceptions they protrude excessively and have sharp edges that can snag clothing or cut your hand.

 

[LeLynn]

Yes there is a set screw, althought I'm not sure how easy it will be to knock the sight out after I lossen it. I have considered adding a dab of waterbased paint to the slide and LIGHTLY scribing a line in the paint using an exacto knife (Just enough to mark the paint without scratching the guns finish) for a very thin, precise indicator of the original location and then after reassembly simply washing the paint off. Has anyone used a method something like this to mark the sights?