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S&W M&P M2.0 drifting rear sights


Illini2A312

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Hi all,

 

After a few range trips it seems my M&P's rear sights are off-center to the left (just bought it new a few months ago). Does anyone have a suggestion for a good punch/drift kit for this gun (9mm if that matters)? Also, how much of an issue is a bit of drift (should this get addressed ASAP or is it usually easily compensated for)?

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Use either a piece of hardwood dowel, or a plastic such as

delrin. Clean the bottom of the sight and the sight channel with rubbing alcohol, and spread a bit of blue loc-tite on the underside of the sight. Insert the sight into the channel, and tap lightly with the punch until it's where you want it and wipe off any excess loc-tite.

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Full Disclosure:

I do not own an M&P. However I have used the Loctite formulation below for decades in auto, moto, appliances, and firearms.

 

Try loctite green "wicking grade". 290, available in sizes from 1/2 mL to 1 L.

 

10 mL is a lifetime supply for personal use.

https://www.amazon.com/Loctite-High-Strength-Threadlocker-Maximum-Temperature/dp/B000P1FY6O

 

6mL tube is easy to use.
https://www.amazon.com/Loctite-487234-Penetrating-Threadlocker-6-milliliter/dp/B000IHLZ5E

 

You can get the sight where you want it and test it at the range.

You can then apply a little amount of this stuff from the outside with the applicator or a toothpick.
It will wick in place and then provide a medium strength lock.
Clean off any excess after it sets for a few minutes.

and if it's all very clean before you use it, it works better.

 

I use it to seal sight bases to receivers, and scopes to rings, adding to the strength of just using the mounting screws.
(vs the traditional method of using loctite on those same screws.)

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Is green somewhere between blue and red? I'm not familiar with green.

http://henkeladhesivesna.com/blog/the-difference-between-red-blue-green-and-purple-threadlockers/

 

The Difference Between Red, Blue, Green and Purple Threadlockers

 

So what is the difference between the Red, Blue, Green and Purple threadlocker?

 

red threadlockerLoctite® Red Threadlocker is the highest strength. This product cures fully in 24 hours and is available in both a liquid and as a semisolid anaerobic. The red products are so powerful that they require heat to be disassembled. A primerless grade red threadlocker is also available.

 

[You might also be interested in: How to remove Red Threadlocker]

 

blue threadlockerLoctite® Blue Threadlocker is of medium strength. Again this product cures fully in 24 hours and can be dissembled with hand tools. In addition to being available in a liquid and a semisolid, there is also Loctite® QuickTape® 249 Threadlocker; the one and only of its kind globally. A primerless grade blue threadlocker is available as well.

 

[You might also be interested in: Blue Threadlocker Basics]

 

Green threadlockerLoctite® Green Threadlocker is recommended for locking preassembled fasteners, e.g. electrical connectors and set screws. The product is categorized as medium-to-high-strength for wicking. It is also available in a liquid form, cures in 24 hours and can be removed with heat and hand tools.

 

purple threadlocker

 

Loctite® Purple Threadlocker, also known as Loctite® 222, has become one of our most successful products. Loctite® 222 cures in 24 hours. It can also be used on low-strength metals such as aluminum and brass. This offers a lot of flexibility to the user. Find customer testimonials and more information on our purple threadlocker in When and Why to Use Purple Threadlocker.

 

All threadlockers have a broad temperature resistance of -65°F to 300°F, some going up to as high as 650°F.

 

Threadlockers were Loctites first product line; they combine a mix of complex chemistry and engineering. Simply put, this product is an anaerobic adhesive applied by drops to the threads of fasteners. It then cures to a hard thermoset plastic that locks the threads together. They are used only for metal to metal applications

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There are two green grades:of Loctite, one is a threadlocker, the other is not.

 

1. Wicking grade threadlocker, former trade name "Wick 'n' Lock", used as I described above, or as in the Henkles article linked in the previous post above.
It has been used before in manufacturing as a weld sealant.

 

2. The other kind is called Cylindrical Retaining Compound and/or Bonding Glue and is designed for permanent use.

it's the primary color in the 600 series.

603, 609, 620, 638, 640, etc.
Do not use this for casual screw locking, This stuff laughs at the Red Loctite
It's used in industry for the permanent assembly of cylindrical surfaces, such as sleeves inside of castings, or pinion gears on shafts.
The different grade numbers in the 600 series can optimize slip-fit vs press-fit implementations.
BTW: there are also hi-viscosity (creamy) versions of this series designed to fill gaps/damage in materials such as where spun bearing has worn away parent metal in a casting. (eg. 660, grey color)

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