Cotton in the trigger spring

[shawn mccarver]

Shawn,

Your post has to be the most informative post (9/2015) I ever read on this forum. Concerning the M & P series. the trigger springs in my 2.0's appear identical to the 1.0 series so maybe S & W made no change in the spring or spring material ? I searched Wolf if they produce to replacement trigger spring but NOT for duty or civilian use, surprised me. Since you are so knowledgeable any suggestion on source for replacement springs. What is your opinion of stainless replacement springs?

I as well as other M & P shooters would benefit from you recommendation for better quality trigger, extractor and hammer springs.

I have no use for non-factory parts. I think the best solution is to replace the factory spring on the maintenance schedule suggested by S&W, which I understand is the same as the recoil spring.

 

[m&p2.0fdethumbsafety]

Shawn,

Your post has to be the most informative post (9/2015) I ever read on this forum. Concerning the M & P series. the trigger springs in my 2.0's appear identical to the 1.0 series so maybe S & W made no change in the spring or spring material ? I searched Wolf if they produce to replacement trigger spring but NOT for duty or civilian use, surprised me. Since you are so knowledgeable any suggestion on source for replacement springs. What is your opinion of stainless replacement springs?

I as well as other M & P shooters would benefit from you recommendation for better quality trigger, extractor and hammer springs.

the foam insert is not present in the full size or core versions of the gun. it is found in the "le only" version of my m&p 2.0 compact 3.6 inch


it seems the compact version of the m&p 2.0s have "vestigial" features like the tension spring in the slide stop lever, and the foam insert, whereas the later versions did away with them.

 

[Model 15-4ever]

I think I'll just let my hot pistol cool naturally, and avoid the water submerge method.

In the event it takes a falls into the creek, a full detail clean is called for.

 

[rosewood]

My Sigma 40F from way back around 1997 or so has the fuzz in the trigger spring.

Rosewood

 

[WR Moore]

Our experience with the M&P40 1.0 matches that of SOCALDEP. The only failure I experienced in 9 years was the takedown lever broke, I discovered it when attempting to clean the pistol after qualification. Since the slide retaining stud was intact, the firearm was still serviceable, but we obviously changed the item. Our pistols also got twice a year ultra sonic cleaning and armorer inspection. Tampons stayed intact.

For those who might be interested, this is the factory suggested LE maintenance schedule. I assume the time suggestion stays with the the additional service items as the round count goes up. FWIW, my personal example got a recoil spring & striker assembly change after about 10 years/????? rounds and had zero malfunctions during that time. Think I changed the trigger return spring at the same time.

S&W M&P SERVICE SCHEDULE

M&P9/40

Every 5K rounds/5 years replace:
Coil pins
Magazine springs and followers
Recoil spring assembly
Slide Stop
Trigger return spring.


Every 10K rounds, replace the additional items:
Striker assembly
Trigger bar assembly

Every 20K rounds, replace the additional items:
Ejector
Locking block
Magazine catch
Striker block, spring and spacer
Takedown lever and retaining wire

M&P45 the same, except the striker replacement interval is at 20K rounds.

No suggested replacement for the extractor only two broken reported to the factory by 2015. There have been two revisions to the extractor since introduction of the M&P line. The first was marked with an "L" for a longer hook, slightly more rake on the hook and a sharper edge.

The latest revision was named the "Phillips" revision, possibly in 2016. Has a P on it.

 

[lar45]

Hi everybody. I realize this is an older thread, and I apologize for the resurrection.
I have just been acquainted with the "Tampon"
I have a huge pile of guns from 1866 to present in all sorts of sizes, shapes and calibers, and have never came across this until now.
Putting any kind of material inside of a spring just seems like a bad idea to me.
A friend of mine owns a local gun shop and said he bought a Sccy CPX2 9mm and has put well over 1000 rounds through it without any problems. I was in need of a few inexpensive small-ish handguns, so I had him order me a few. The trigger pull was kind of long and stiff and someone told me about the Mcarbo spring kits, so I ordered several and installed them. The trigger pull went under 4#.
We started shooting one of them getting used to it and then it started to misfire. It wouldn't pop the primer. Pull the trigger again and it would fire. On one magazine full it did it 4 times.
I inspected the pistol and found what looked like a cleaning patch had gotten shredded inside of the main spring and was getting packed between the coils. I had to stretch the spring a little and use a punch to push the tampon out. I put it back together and it still had the occasional misfire. Maybe I pulled on the spring too hard trying to get it cleaned out? I looked at the other springs and they all had the tampon in it. I didn't take a picture of the first one before I cleaned it out. One of the others was starting. I'll try posting a picture, it shows the fuzz starting to come out between the coils.
I pulled all the replacement springs out and put the stock springs back and noticed that the Sccy main springs had a strip of black felt in them.
I emailed Mcarbo and he said that S&W started this practice. So I searched here and found this thread.
I think this is a terrible design practice. Shouldn't there be some safer way of dampening the harmonic vibrations?