M&P 9 magazine disconnect disabled!

[AlbertaGunslinger]

So I just disabled the magazine disconnect on my M&P 9mm and figured I'd share a bit of info.

So as you may or may not know, most people say that you need a replacement spring to keep pressure on the sear disconnector if you remove the magazine disconnect. I have found that this is not the case, you can simply disable the mag disconnect by removing the spring tension from it (by repositioning the spring), you can then add a little extra width to the mag disconnect with some sort of shim or other material (I used hot glue). This will disable the mag disconnect and the extra material will keep tension on the sear disconnector to ensure that it works properly.

So if you have an M&P 9, and you don't like the mag disconnect, it is a pretty easy fix and you don't need any special replacement parts.

 

[ampegor]

i just used a small spring from my collection - has worked fine for 4000 rnds

 

[skip1600]

Pen springs cut to size work best.. Your taking the assembly apart anyways you could easily put a spring in

 

[Kieran]

I don't know if hot glue is a good replacement for the right spring... introducing foreign material to the sear assembly opens you up to further issues... Dan Burwell seggests using a cut down 1911 mag release spring... for a $1.50 or so I think its worth the added reliability and safety than something that you found in the crafting asiel of Michaels.

http://www. brownells.com/handgun-parts/frame-parts/magazine-release-parts/magazine-release-springs/1911-auto-factory-plus-magazine-release-spring-prod41835.aspx

 

[themikea]

Is hot glue really a good material to be using? Not sure how many rounds you have put through it since the modification, would be interested to see how that holds up long term.

 

[AlbertaGunslinger]

I realize that hot glue doesnt seem like a great option but it is not placed under any stress during firing, it is on the opposite side as the sear disconnector and nothing on that side moves. I did not realize till after that a pen spring may work as a substitute. I plan to put some rounds through it anyway though and see how it does. ALso int terms of introducing foriegn material I was quite careful in my application so as not to have any more than nesseccary and to ensure that thre was none in a place wher it would end up coming off after use.

 

[metcalfe]

I realize that hot glue doesnt seem like a great option but it is not placed under any stress during firing, it is on the opposite side as the sear disconnector and nothing on that side moves. I did not realize till after that a pen spring may work as a substitute. I plan to put some rounds through it anyway though and see how it does. ALso int terms of introducing foriegn material I was quite careful in my application so as not to have any more than nesseccary and to ensure that thre was none in a place wher it would end up coming off after use.

It is placed under stress. Heat is a form of stress, and heat is what you used to melt the glue in the first place.

It's silly enough that a pen spring is in my m&p, you didn't have to one up us all with glue...
Rip that junk out and put a spring in there. Your idea isn't worth screwing up your trigger group if it doesn't work out.


My opinion/your gun. Take it for what it's worth.

 

[GarDian]

My experience with hot glue is it doesn't hold well when used on metal and certain kind of plastics. Also the heat and shock from firing might knock it loose. That besing said, I've never used hot glue on polymer type plastic so keep us updated on how it holds up.

 

[jackrabbit000]

x2...almost guaranteed that it won't hold.

 

[woodlotowner]

Most new M&P pistols will fire with the magazine removed and have this warning etched on the side of the gun. I'd be interested to know what the actual modification is to a pistol without this 'ability'. Tagged.

 

[themikea]

Most new M&P pistols will fire with the magazine removed and have this warning etched on the side of the gun. I'd be interested to know what the actual modification is to a pistol without this 'ability'. Tagged.

There are models with and without the magazine safety. The ones without have that warning etched on the slide. They have different model numbers.

 

[Winz]

There are models with and without the magazine safety. The ones without have that warning etched on the slide. They have different model numbers.

When I got my M&P few years ago, removing the mag disconnect was the first thing I did before even firing it. I'm glad I don't have a pistol with a silly warning etched to the slide.

 

[woodlotowner]

When I got my M&P few years ago, removing the mag disconnect was the first thing I did before even firing it. I'm glad I don't have a pistol with a silly warning etched to the slide.

I hear you and I agree. You may wish to consider disclosing that particular modification if/when you sell the pistol. I think that was Smith & Wesson's idea with the etching. Ugly, but in your face disclosure.