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Discussion Starter #1
This is my first time noticing these two areas as potential problems. I had two ftf's on my first time at the range and I just noticed this indention when I took the gun apart randomly tonight...is this normal?







The second part is right around the firing pin the lip to the left (in the picture) has a good sized notch taken out of it that looks like it might have happened from the brass end of the snap caps.



 

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J-



As for the feeding ramp photo, this doesn't look right. I have about 1200 through the pipe and mine looks nothing like yours. Maybe a little bit of the finish worn but no chucks removed.



I assume that you are talking of the slight elongation of the firing pin hole. This I have. Very minor as is your but still it is there. I have never had any firing problems.



I am looking forward to other responses to see what they have to say.
 

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Maybe I am confused, but the top photo I see is not the feeding ramp. The feeding ramp is part of the barrel, not the frame. What your photo shows is the mark on the frame caused by the manufacturing process. Some marks are more pronounced than others, but most show some marking. I would suggest that you keep an eye on it, and if it gets worse or it bothers you, give S&W a call. The tear drop on the breach face is normal and that's the way it was made. What's depicted in both photos will have no effect on how the gun functions....in my opinion.
 

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Discussion Starter #4
I will try and get a better picture tomorrow of the firing pin area...I guess you cannot really see it from there, I know about the revision where they added the teardrop cut-out on the firing pin hole. It is actually a piece of the frame right next to where the pin contacts the primer.



And you are right about the feeding ramp, sorry I am not too well versed in the proper names, the first picture is from the lower half of the gun.
 

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The small bump on the locking block is normal.



The tear drop cut around the firing pin hole is normal.
 

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like others said, that's not the feed ramp, that's the locking block, which as far as i can tell is MIM or cast. That's basically where the spure was attached, kind of like a piece froma plastic model kit. Yours is a bit more messy than many, but looks within tolerences.





AS for the firing pin hole, the teardrop is normal. Earlier serial numbers don't have it, but later ones do. It is there to help with reliability in the case of primer flow. If you lookk at fired M&P brass, it smears the striker impact dent. you combine that with a hot load and soft primers, and you can bind up the firing pin. So they made the teardrop relief cut.
 

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jbparrothd21 said:
This is my first time noticing these two areas as potential problems. I had two ftf's on my first time at the range and I just noticed this indention when I took the gun apart randomly tonight...is this normal?







The second part is right around the firing pin the lip to the left (in the picture) has a good sized notch taken out of it that looks like it might have happened from the brass end of the snap caps.





Is your MP rev N? MU serial starts with MPMXXX What is yours?
 

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Discussion Starter #8
I have Rev N...MPM3xx. I could not get a better picture with the camera that I have, but the second one is not about the teardrop cut, it is the piece of frame just to the left of where the firing pin comes through in that picture. One of the snap caps that I have been dryfiring with got caught there and kind of gouged it, but doesnt seem to affect it. I am going to the range next week so I will give it a try.
 

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The photo in the top is of the locking block not the feed ramp. It has caused a problem in my MP and is at the factory fo repair. The feed ramp is the smooth portion of the barrel just below the rear of the chamber.
 
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