Common Problems and Solutions - MP-Pistol Forum

Common Problems and Solutions

This is a discussion on Common Problems and Solutions within the MP Pistol Tech Help forums, part of the Smith & Wesson MP Forum category; At the request of the membership, One of the 1911 forums has a sticky thread where folks can list common problems and solutions/fixes. The M&P ...


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Old December 14th, 2006, 05:38 PM   #1
 
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Common Problems and Solutions

At the request of the membership,



Quote:
One of the 1911 forums has a sticky thread where folks can list common problems and solutions/fixes. The M&P seems to be well-suited for this type of thread. So far the problems with the M&P seem to be confined to a few specific issues (gritty triggers, loose sights, etc.). A fair amount of bandwidth is being used to recount the same problems over and over. Just a thought.


Thanks Bloodnut!
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Old December 14th, 2006, 06:05 PM   #2
 
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Gritty Trigger

That was quick. I'll get it rolling.

Problem: Gritty Trigger (probably the No. 1 compliant)



Solution(s): Lube the trigger bar and firing pin safety where these two parts bear on each other. Or, have a trigger job/polishing done.







Edited to show problem in the subject line. Buckshot
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Old December 14th, 2006, 10:55 PM   #3
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Loose Sights

Issue seems to be with the first batch of 9mms with the dovetails cut too large. Send it back to S&W for a new slide.



Magazines Popping out on their own.

Issue has been reported mainly with .40 in earlier serial numbers. Send it back to S&W for a frame replacement.



RollPins walking out

This issue was with preproduction M&P .40s and some very early models.



Broken strikers or light strikes

Send it to S&W for a new one or order a new one. The striker design has changed from earlier models.



These are the only problems with some of the early M&Ps I can think of. Most of the issues seem to be resolved.



Not hitting Center of Target.

Most likely shooter error. Shoot the gun from a rest. Have other experienced shooters use the gun. If problem still persists, send it to S&W to have them give it a look over.



Slide Not Locking Back or Locking Back with rounds in magazine

Watch your thumbs and fingers. Most likely shooter is pushing the slide release up or down during fire.



Magazines dropping

Shooters also should watch their grip to not inadvertently release the magazine during fire. A thumbs forward grip works the best with the M&P.



Problem: Failure to Eject or Fire.

Solution: Use quality ammunition from a major manufacturer.



I have seen this one a number of times where the owner curses the gun only to find they used someones cheap reloads or low quality ammunition from American Ammunition or the such. Other problems I have seemed come from hard primers or primers that were not properly seated



Thankfully, S&W has great CS which will look over their guns on their dime.
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Old January 17th, 2007, 05:35 PM   #4
 
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I seemed to have a lot of those problems. My M&P shot low left at ten yards when bench rested off shot bags. I've been shooting pistols for 40 years, so was pretty sure it wasn't me. Next, it started dropping magazines during live fire. I thought it may be my grip, so was very careful how I held it and it still happened. S&W fixed both problems. Now I am getting light strikes on primers. I cleaned to striker last weekend and when it quits sleeting will go and see if that rectifies the problem. Other than those, I love the ergonomics of this pistol and hope these problems are gone. I would love to trust it to carry.
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Old April 2nd, 2007, 12:29 PM   #5
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mag drop the only problem with my full size 40.this after 4000+rounds.label from s&w on the way to send mine back.wll carry wifes 9c while waiting or till she finds out as far as trigger goes its smooth as silk now, again 4000+rounds
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Old April 13th, 2007, 02:20 AM   #6
 
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Matt 7184, Being a newbe thank you for all the information you posted about the early problems. I just purchased a used M&P 40, I don't know if it is a early one or not. Is there a way I could check when it was made to see if mine might be early enough to have some of these problems? In another words, is there a certin prefix or anything to the serial number to let me know if mine is one of the early models you mentioned? Thank you, Frank. Mine starts with MPB.
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Old April 30th, 2007, 08:57 PM   #7
 
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Quote:
Originally Posted by matt7184
...Locking Back with rounds in magazine

Watch your thumbs and fingers. Most likely shooter is pushing the slide release up or down during fire.




Thankfully, S&W has great CS which will look over their guns on their dime.


Slide release and/or spring was bad on my full size 40 and was promptly replaced be S&W on their dime, FWIW. Awesome customer service & I got a free mag!
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Old May 29th, 2007, 06:22 AM   #8
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RollPins walking out

This issue was with preproduction M&P .40s and some very early models.



Not so. I have a brand new M&P40s and my locking block coil pin (the pin that engages the notch in the take down lever) is walking from the recoil. How do you quantify that this problem is limited to preproduction guns, just curious? Did the factory change the specs on the pin or the frame hole since? Thanks.
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Old November 25th, 2007, 06:20 PM   #9
 
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It appears that most of the problems are coming from the MP9. Am I wrong?
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Old March 4th, 2008, 10:25 PM   #10
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Quote:
Originally Posted by 40Frank
Matt 7184, Being a newbe thank you for all the information you posted about the early problems. I just purchased a used M&P 40, I don't know if it is a early one or not. Is there a way I could check when it was made to see if mine might be early enough to have some of these problems? In another words, is there a certin prefix or anything to the serial number to let me know if mine is one of the early models you mentioned? Thank you, Frank. Mine starts with MPB.


I think you have one of the first two or three thousand MP's that were made.
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Old March 4th, 2008, 10:30 PM   #11
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Quote:
Originally Posted by KaPPaBaLL
It appears that most of the problems are coming from the MP9. Am I wrong?


If more people own the 9mm....which I dont know....than there would be more reports of problems with the 9mm..... "if" all calibers were equally problematic....then the higher selling model would have more reports.
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Old March 12th, 2008, 03:54 PM   #12
 
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Quote:
Originally Posted by CBRADGO' post='35477' date='May 1 2007, 05:57 AM
Slide release and/or spring was bad on my full size 40 and was promptly replaced be S&W on their dime, FWIW. Awesome customer service & I got a free mag!


This issue is getting very frustrating for me!



I sent my M&P 40c back to S&W 3 times. They finally replaced the slide lock lever spring.



I went to David Bowie for a shooting lesson. He helped me adjust my grip and that seemed to help for a while, but later on I duplicated the grip he showed me (or so I thought), and the problem returned. I've talked to S&W and they keep telling me to send it back so they can look over it again. But I'm not sure how much good that will do.



David suggested maybe we could replace the lever release button with the older one, which was flat against the frame. That would make it less likely for me to brush against it. But so far, S&W can't seem to come up with any of the old ones for us to try. I've tried changing out the backstraps; all that did was make my aim worse.



I'm afraid I'm coming to the conclusion that this particular gun in this particular caliber might not be a good match for me.



But I'm also torn about going to a 9c. I don't like the ballistics numbers I see out of a short-barrel 9mm. The 9mm just doesn't have enough time to pick up much energy in a compact gun. I'd prefer to stay with the 40 (or a 45, if I can find it in the right compact package). But the M&P is the only compact 40 that can be easily controlled!



So I don't see any good answer. I'm stumped!
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Old March 12th, 2008, 05:08 PM   #13
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I'm not sure where you're getting the ballistic data, but if anything 9mm is probably least likely to be adversely affected by a change from 4.25" to 3.5" barrel. The .45 in particular is notoriously handicapped out of short guns, since the ammunition is designed to function best at velocities achieved out of a 5" barrel (cf. 4" for the 9mm and .40).



However, I'd recommend against getting the 9c unless you're absolutely certain the slide catch won't get in your way. It sounds to me -- and it's hard to diagnose without seeing you shoot -- that David showed you a grip that worked but over time you've reversed back to some old habits, even if it looks the same.
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Old March 12th, 2008, 05:13 PM   #14
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Quote:
Originally Posted by ToddG' post='115820' date='Mar 12 2008, 06:08 PM
I'm not sure where you're getting the ballistic data, but if anything 9mm is probably least likely to be adversely affected by a change from 4.25" to 3.5" barrel. The .45 in particular is notoriously handicapped out of short guns, since the ammunition is designed to function best at velocities achieved out of a 5" barrel (cf. 4" for the 9mm and .40).
I'm going to have to agree with ToddG on this. When it comes to short barrels, the ballistics of 9mm and .40 are quite good because 9mm and .40 loads are optimized for 4" barrels.
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Old March 13th, 2008, 03:36 AM   #15
 
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Quote:
Originally Posted by choochboost' post='115822' date='Mar 13 2008, 02:13 AM
I'm going to have to agree with ToddG on this. When it comes to short barrels, the ballistics of 9mm and .40 are quite good because 9mm and .40 loads are optimized for 4" barrels.




OK, sorry. Didn't mean to start a ballistics debate. I forgot where I saw the data I was referring to, anyway. I saw a table or a comment on another forum (Internet comments are always correct, aren't they? ) that seemed to imply the 40 was better for short barrels due to its higher energy. I can't retrieve that data now, so it's really irrelevant.



Todd, I agree. I've probably reverted back to my old grip. I wouldn't mind taking multiple lessons until I really get the "correct" grip muscle memory. However, David is an hour and a half from me, so that's just not a practical solution. I haven't had much luck finding any local instructors who are proficient with the M&P.



Bottom line: I know my grip sucks, but it's not like I haven't been trying to fix it. But if I can't get keep the correct grip when I'm concentrating on every shot, I'm a little worried about having the correct grip if I need to use the gun in a hurry at 2 AM some night. I guess I'm a little worried about the "interface" between me and this particular gun frame. If the "correct" grip is so counter-intuitive that I can't recreate it even a couple of weeks after a lesson, then maybe this isn't the right gun for me. I don't have time to shoot daily (or sometimes even weekly) like the pros do. I get to the range a lot, but if I need to practice my grip hours a day every day, then this isn't the right gun for me.



For what it's worth, David actually got me thinking about the 9mm. He's a big 9mm proponent, and his belief is that if the recoil of the 40 is what's making my thumb brush the slide lock, maybe I'll have better luck with the 9mm. He stated at one point during my conversations with him that the 40 is prone to more problems like this because of the amount of muzzle flip it generates compared to a 9mm. He recommended I at least seriously consider switching over to a 9mm. So I am consdiering it.



I don't want to tick anyone off and start a ballistics or caliber debate here. I prefer a bigger bullet, but reliability from a smaller one is probably more important than an intermittently dependable big one (and I'm solely talking about my interface with this particular gun, not a vague generality!)
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