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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; Hello, I'm very new to this forum, but after reading about the problems with the early production M&P40s, I'm a bit concerned with my roll ...


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Old April 17th, 2009, 11:45 PM   #16
 
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Hello,



I'm very new to this forum, but after reading about the problems with the early production M&P40s, I'm a bit concerned with my roll pins (I've also posted a question in the "mag drop" section although I've never really had that problem). I am quite happy with this gun, but am no expert on the matter, its only my 2nd pistol (I've owned a Ruger P89 for 15+years). I've shot the gun 800+ rounds since I bought it new in late July '08. The SN is MPA**** and the brass is dated 2/2/06. The roll pin in front of the take down lever is sticking out of the left side of the gun less than 1mm and is recessed into the right side of the gun. The rear roll pin is flush with the left side of the gun & very slightly recessed into the right side. I would not have noticed, but after reading the common problems I took a close look at the gun.



Considering the early SN/date of the gun what course of action should I take? I'm expecting to order a new mag catch at least, but I'm wondering if the gun should be sent back to S&W? What is the fix for the roll pins walking out of the gun?



Thanks

Chad
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Old April 17th, 2009, 11:59 PM   #17
 
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were the pins flush when you got the gun? can you tap the pin back in?
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Old April 18th, 2009, 08:32 AM   #18
 
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I can't say I have noticed the pins have moved over time. I'll reset them so they are centered in the gun & keep an eye on them. I guess I should not be too worried about my gun, it has performed almost flawlessly. After seeing my SN was so low (MPA6***), and reading about the problems with the early production, I got a little jumpy.



I'll be busy reading everything I can find here. Looks like a great forum with tons of info.



Thanks

Chad
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Old April 18th, 2009, 09:25 AM   #19
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Quote:
Originally Posted by c-w-a' post='202366' date='Apr 18 2009, 12:32 PM
I can't say I have noticed the pins have moved over time. I'll reset them so they are centered in the gun & keep an eye on them. I guess I should not be too worried about my gun, it has performed almost flawlessly. After seeing my SN was so low (MPA6***), and reading about the problems with the early production, I got a little jumpy.



I'll be busy reading everything I can find here. Looks like a great forum with tons of info.



Thanks

Chad


I have had 2



1. FTE - rack slide harder. 1k rounds since, no trouble.



2. Gritty Trigger. - Send for trigger job, hopefully soon.\



3. Awesome to shoot but hard to get ammo - expand production......and licking hurry
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Old April 19th, 2009, 07:03 PM   #20
 
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I've had my M&P 40c for about a year now and I'm starting to notice a couple issues that are definitely bothering me. I'll see if I can describe them accurately enough and see what everyone's opinion is. Whether its me or the gun.



1) Light strikes causing the round to not fire. I'm using WWB ammo and its only about 1 out of 50 rounds, so I'm guessing that one is probably all ammo related.



2) Pull the trigger and nothing happens. Can't feel the striker hitting or anything and its always happened around the 4th-6th shot through the 10 round mag from what I can remember. Pull the slide to eject the round and load a fresh one and it works just fine again. Had this happen probably 3 times out of 200 rounds today.



3) Fire a round and the slide doesn't come all the way back forward. It isn't that far out, maybe 1/8th of an inch, but its enough that the gun won't fire the next round unless I nudge the slide forward that 1/8th inch into place. This I usually start to notice near the end of my trip to the range and someone mentioned that it may be grip related as my hands are getting tired.



Any thoughts?
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Old April 19th, 2009, 07:25 PM   #21
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Quote:
Originally Posted by stormweaver1983' post='202682' date='Apr 19 2009, 11:03 PM
I've had my M&P 40c for about a year now and I'm starting to notice a couple issues that are definitely bothering me. I'll see if I can describe them accurately enough and see what everyone's opinion is. Whether its me or the gun.



1) Light strikes causing the round to not fire. I'm using WWB ammo and its only about 1 out of 50 rounds, so I'm guessing that one is probably all ammo related.



2) Pull the trigger and nothing happens. Can't feel the striker hitting or anything and its always happened around the 4th-6th shot through the 10 round mag from what I can remember. Pull the slide to eject the round and load a fresh one and it works just fine again. Had this happen probably 3 times out of 200 rounds today.



3) Fire a round and the slide doesn't come all the way back forward. It isn't that far out, maybe 1/8th of an inch, but its enough that the gun won't fire the next round unless I nudge the slide forward that 1/8th inch into place. This I usually start to notice near the end of my trip to the range and someone mentioned that it may be grip related as my hands are getting tired.



Any thoughts?




Problem #2 may be being caused by problem #3.

What's causing #3 is another issue but it may be you need a new recoil spring if you've had the pistol 1 year (how many rounds through it?)
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Old April 19th, 2009, 08:42 PM   #22
 
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Quote:
Originally Posted by The Fish' post='202686' date='Apr 19 2009, 11:25 PM
Problem #2 may be being caused by problem #3.

What's causing #3 is another issue but it may be you need a new recoil spring if you've had the pistol 1 year (how many rounds through it?)


Hmm...I'd guess somewhere between 500-750 rds through it. 1000 at the absolute most. I just got done breaking it down and cleaning it and I did notice something strange with the recoil spring. The coils on the spring are not symmetrical. If I hold the spring horizontally, the coils have a bit of a vertical wave. Something tells me that isn't normal.
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Old July 25th, 2009, 11:26 AM   #23
 
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40c slide release & "slingshot"



I just picked-up my 40c Thursday night. The slide release would not release unless I pulled back on the slide - even with a finger on each side of the slide pushing down. After checking it with differant mags, with and without the mags, it appeared it was just as you all described in several posts here - sharp edges on the mating surfaces. After ~25 cycles with a mag in, it is now at the point that I can do it one-handed with my thimb. Problem solved.



NO SLINGSHOT -

This compact would NOT slingshot the slide shut and feed a round; negatory. UNTIL - I ran the above drill for the slide release and now it is 100%.



When I put it through its initial testing at my FFL's I was pissed that it would not work right. I know S&W would make it right, but dang.



I'm a big Beretta guy and those well - they are smoooooth right out of the box.



Lessons learned:

- Read your Forum

- Realistic expectations

- Every gun is different



Range testing tomorrow!



If this Compact is as good as my M&P FS40 & 45, I'l be one happy sumbitch!
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Old January 23rd, 2010, 05:11 PM   #24
 
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Quote:
Originally Posted by ToddG' post='115820' date='Mar 13 2008, 01:08 AM
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.


The Speer Gold Dot is available in a short barrel version. The bullets are also available for reloaders.



Why would you want a compact model? My full size M&P (4.25 barrel) is the smaller of my three carry pistols. The others being a Para 7-45 (5" 1911) and the other is a S&W 686Plus with 4" barrel. I've carried a 1911 for over 30 years, on duty and off, concealed and open carry. If you have a M&P 40 you can get a 357 Sig barrel from Brownells.
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Old January 23rd, 2010, 05:38 PM   #25
 
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Quote:
Originally Posted by stormweaver1983' post='202682' date='Apr 20 2009, 03:03 AM
I've had my M&P 40c for about a year now and I'm starting to notice a couple issues that are definitely bothering me. I'll see if I can describe them accurately enough and see what everyone's opinion is. Whether its me or the gun.



1) Light strikes causing the round to not fire. I'm using WWB ammo and its only about 1 out of 50 rounds, so I'm guessing that one is probably all ammo related.



2) Pull the trigger and nothing happens. Can't feel the striker hitting or anything and its always happened around the 4th-6th shot through the 10 round mag from what I can remember. Pull the slide to eject the round and load a fresh one and it works just fine again. Had this happen probably 3 times out of 200 rounds today.



3) Fire a round and the slide doesn't come all the way back forward. It isn't that far out, maybe 1/8th of an inch, but its enough that the gun won't fire the next round unless I nudge the slide forward that 1/8th inch into place. This I usually start to notice near the end of my trip to the range and someone mentioned that it may be grip related as my hands are getting tired.



Any thoughts?


Generally, semi-auto (striker and hammer fired) don't have problems with light striker strikes. Federal primers are the easiest to lite and we use them in revolvers set up for competition. Take your striker out and check it over to see if anything is binding, roll it to make sure it's straight and check the firing pin tip to make sure there no burrs and make sure it easily slide through it's hold in the breach face. I wouldn't suspect a weak striker spring, but it is a possibility.



As for the slide returning to it's battery position, remove your recoil spring and see if the slides moves back and forth without any problems, if so, check the slide rails to see if there are any burrs or crud. Your recoil spring could be weak - they need to be replaced eventually. I use a Wolffe spring guide rod and three different weight springs so I can tune the pistol to the power factor of the ammo being used. I don't have a mag disconnect or a lock on my M&P 40 so I can't say if those things could cause any problems.
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Old April 1st, 2010, 04:33 PM   #26
 
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I have an older .40c. I bought it about a month or so ago at Cabelas, but the envelope containing the fired cartridge was dated two years ago.



Sure enough, I already broke the striker with about 500 rounds. S&W says they don't have any in stock and have no idea when they can get my gun back to me if I were to send it in. So I asked if they could just send me one when they get some in.



I ordered one from Midway and three days later it is installed in my gun. It appears to be the latest version MIM and shiny. The one that broke was black and milled.



I've never had a striker fired pistol break a striker before. Disconcerting.
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Old February 8th, 2011, 07:10 PM   #27
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Quote:
Originally Posted by stormweaver1983' post='202682' date='Apr 19 2009, 07:03 PM
3) Fire a round and the slide doesn't come all the way back forward. It isn't that far out, maybe 1/8th of an inch, but its enough that the gun won't fire the next round unless I nudge the slide forward that 1/8th inch into place. This I usually start to notice near the end of my trip to the range and someone mentioned that it may be grip related as my hands are getting tired.



Any thoughts?




That sounds a lot like an ammo problem, a lack of lubrication, or both.
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Old August 8th, 2012, 06:03 PM   #28
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Malfuntioning

Quote:
Originally Posted by matt7184 View Post

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.
No. The slide locks back with rounds in the mag of my M&P 40c. This is NOT user error, not ammo specific or magazine specific. Just happens now and then, because of this I pay close attention to my grip, thumb, etc. It's the gun. A google search reveals others having this problem.

This isn't a fun gun. I carry it and depend on it to protect myself and my family.

Do I need to send it back to S&W or is there a fix others have heard of?

Being from Massachusetts is it difficult to mail? Should I have the store I bought it from mail it?

I'll run some more rounds through it just to be over 100% positive it's the gun. But, it looks like it's leaning towards sending it in to S&W.

Last edited by Crusader762; August 8th, 2012 at 06:05 PM.
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Old August 8th, 2012, 07:17 PM   #29
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MPAXXXX was the first 10,000 units and MPBXXXX the next 10,000
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Old September 1st, 2012, 09:48 AM   #30
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I have an M&P 40c that I bought new about 2 weeks ago (spent cartridge that came with it was fired 2/2012), and I have this same problem... just with reloads so far. It's weird because otherwise the cartridge appears to fire the same as the other cartridges before and after it, but for some reason I get a few where the slide doesn't go back to battery. I've even been measuring my reloads with a chrony, and the rounds that the slide fails to go to battery on also have the same or better velocity than the rest of the rounds. I've only fired about 30 factory loads through this weapon, and I didn't have a problem with any of those, but out of the 300ish hand loads I've run through it, I've had the out of battery problem about 10 times.

I suppose I shouldn't be concerned because I load up my magazines with good factory self defense ammo when I carry, but it's a little frustrating nonetheless. Mainly because I fired a good 1000+ hand loads through my Glock 19 and never once had an out of battery problem. Of course, I used after market recoil springs in that beast. I really wish I could get those for the 40c. I've only seen them for the FS models.

Anywho... I'm wondering... since I've been firing 9mm for the last couple of years, could this just be a problem with the way I'm firing the weapon? It definitely has more kick than the Glock (obviously), so I'm thinking maybe it's the shooter and not the weapon.
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