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Is anyone aware of any "improvements" or changes that have taken place during the production run of the M&P? I have an M&P 40 with an MPB serial number and was wondering if anyone has compiled or is aware of a timeline documenting those little tweaks that S&W throws in from time to time and how they correspond to serial number ranges.
 

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There were several changes introduced, most during the MPBs.

1. changed the strikers- 2 improvements one put more radius where the split collar "grabs" on some were shearing here, and put a thicker "pad" on the sear engagement surface- I assume that was to give it a little more spring tension for harder primer hits.

2 put a tear drop cut just below the FP hole on the breach face helps with primer flow.

3. they changed the take down lever from a s shape to a straight leg I think they have changed back thankfully the straight ones are a pain to take down.

4. The revised the frame I have no idea what they did to it in the revision though.



I think I am forgetting something but some one will jump in here and remind me I am sure.



PS My personal carry is a MPA without any of the changes I beat the heck out of it and still trust me and my family's life to it.
 

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Ernest Langdon told me that the sear housings were upgraded as well because the strikers were dragging causing light strikes.
 

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I'm going to buy an M&P40 soon and would like to be sure that I get one with all the latest upgrades. What should I be looking for? Anything else been tweaked with since that last post in Nov? What serial number(s) should I be looking for? I'm going to try to get the model without the magazine safety and without the Internal Lock. I think it's stocking number is 209300.Thanks
 

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The best way to check is to look at the dust cover for Rev. N, this is the latest revision. You should be safe with anything at or after MPCxxxx.
 

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Well, that just goes to show that I am indeed a "newbee"...I found the answer to my Rev N question and about upgrades in acouple of other posts. Thanks to all for the great input!
 

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Rev M

I'm looking at a used (like New) MPAXXX with a Rev M on the frame. Opinions on the revision level of this M&P? The asking price is $400. Missed my opportunity at the M&P's that Bud's Gun Shop was selling at $399 new. They're up to $447 now...so with shipping and dealer transfer fees, I'm pushing into the $500-zone.



I've been drooling over the M&P's since they came out, but seem to hold them after recent range trips with the old 1911. Pulling the M&P trigger just seems foreign compared to the familiar 1911. Do you get accustom to the springy trigger...eventually? My dealer also has a used CZ75B in 40S&W that is a little less expensive and has a better single action pull.



Advise requested and appreciated.
 

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HELP....should I Buy the M&P40???

Looking at a Rev M M&P40 at a local shop. It's used but in like new condition. I have noted the Rev N mods are not there. After reading through these forums, I'm getting a mixed message on if I should buy this gun or wait for another with the Rev N stamping. Opinions? I'm thinking about re-entering into USPSA competition and thinking of the M&P for a "Production" class gun. If there are truly striker issues and "Primer Flow" issues with the older revisions, I'm thinking the wait is advisable. When I'm competing, I will normally expect to cycle 4000-5000 rounds a year (1500-2000 in competition and 2000-3000 "practicing"). Sounds like the failure rate/incidence for the striker breakage "could" put me through several replacements in a year's time.



Is there "real" issues with the earlier M&P's to be concerned about?
 

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I have a MPA42XX on my side right now and everyday and I am not in the least bit worried about it not being up to snuff. I have shot a lot and have never had a problem. I did replace the slide stop with an extended one just personal preference thing there.
 

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Re: HELP....should I Buy the M&P40???

jakes10mm said:
Looking at a Rev M M&P40 at a local shop. It's used but in like new condition. I have noted the Rev N mods are not there. After reading through these forums, I'm getting a mixed message on if I should buy this gun or wait for another with the Rev N stamping. Opinions? I'm thinking about re-entering into USPSA competition and thinking of the M&P for a "Production" class gun. If there are truly striker issues and "Primer Flow" issues with the older revisions, I'm thinking the wait is advisable. When I'm competing, I will normally expect to cycle 4000-5000 rounds a year (1500-2000 in competition and 2000-3000 "practicing"). Sounds like the failure rate/incidence for the striker breakage "could" put me through several replacements in a year's time.



Is there "real" issues with the earlier M&P's to be concerned about?


How much do they want for it? I bought a brand new Rev N gun for $369. IMO it would have to be a lot less money than that for me to buy it.
 

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The going price is $400, which seemed fair since the new ones in the area are in the $500 range. I did see that Bud's Gun Shop was blowing them out for awhile at $399, but their prices have risen to the $440 range too.



Does the "newer" stiker design require fitting to the "older" M&P's, or is a drop in? It very easy to look at the negative side of firearm performance and label it. Especially with the freedom to express personal opinion through the Internet.



Beyond the firing pin hole tear drop, larger slide release and changes to the striker assembly, any other major changes between the Rev M and Rev N??
 

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jakes10mm said:
The going price is $400, which seemed fair since the new ones in the area are in the $500 range. I did see that Bud's Gun Shop was blowing them out for awhile at $399, but their prices have risen to the $440 range too.



Does the "newer" stiker design require fitting to the "older" M&P's, or is a drop in? It very easy to look at the negative side of firearm performance and label it. Especially with the freedom to express personal opinion through the Internet.



Beyond the firing pin hole tear drop, larger slide release and changes to the striker assembly, any other major changes between the Rev M and Rev N??
Not according to the S&W rep with whom I spoke to on the phone. Do keep in mind, too, that just because it's a "M" rev. doesn't necessarily mean that it doesn't have the striker change...they apparently did that about halfway through the M rev model. Mine's a "M" and has it, and I understand from other threads here that I'm no the only one.
 

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A question of my own: I'm not sure I have the teardrop firing pin hole or not...it is really subtle, or pronounced? Also, what is "primer flow" and why is it a concern?
 
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