JL Murray
Member
My new M&P full sized 9mm is getting a scratch across it when the rounds eject is this normal?
My Shield 9 doesn't do this.
My Shield 9 doesn't do this.
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FS M&P 9 getting scratched by ejection
- Thread starter JL Murray
- Start date
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USAF385
US Veteran
Well just don't shoot it then!
I have two full sized M&P 9s and they both wear differently. It's no concern.
I have two full sized M&P 9s and they both wear differently. It's no concern.
If I wasn't I wouldn't have posted asking if it's normal.
I'm new to pistols as I have only owned revolvers until I bought a Shield a month or so ago, and now the FS M&P last week.
I cleaned it with breakfree CLP but this is still there if it's normal is all I would like to know.
okiegtrider
Member
Ditto. A lil Hoppe's #9 and that little mark will be like it was never there.
okiegtrider
Member
okiegtrider
Member
Huh?
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Yes, it is common. It is just a brass deposit, not a scratch. The soft brass of brass cased ammunition will not likely scratch the hard steel of the slide. Cheap Russian steel cased ammo might be a different story.
Recommendations for cleaning it off have been provided, but if you want to prevent it, take the gun to a competent gun smith who will "tune" the extractor and ejector so the cases eject more upward.
It may only be happening on the last round from each mag, as there is no round underneath pressing up on the empty case as it is extracted and ejected. Thus, with the last round the ejection may be at a lower angle than the previous rounds.
Next time you go to the range, watch after each shot for the mark to appear. If it does not, before you empty your mag swap mags and continue firing. You'll be able to see if it is just the last round causing the mark.
If it is only the last round doing this, you may prefer just to clean it rather paying $50 to a gunsmith. Either way, it's not hurting your gun and it is not really abnormal.
boomerguy49
Member
That's rude. He asks for help and this is what he gets?
My M&P 9c has exactly the same problem and after several different posts on different days, no one could offer any help. I thought it was a worn scratch and groove starting (narrow mark and a wide mark) from the ejected shells wearing away the melonite. I even called S&W for help and all they said was to send it to them with no other comments.
I feel better after reading the other posts here (Thank you, CB3!) and finding out that this is only cosmetic and it seems to be normal for M&P's. None of my other pistols has ever done this.
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Tyrod
Member
I find some of responses to the op a little disturbing. None of us slid down the chute with any knowledge of firearms what-so-ever. Everything we know about this subject, we learned. It's our obligation, nay, duty to impart our knowledge on to others. I'm a firm believer that the only dumb question is the one unasked.
So, this is my answer to the question. Some firearms can do this, not all. Speaking for myself, I'd ignore it. Maybe clean it off once a year. It'll not interfere with the proper functioning of your gun. However, if cleaned often you might begin polishing the finish on your gun which most folks would find undesirable. There is a slight possibility that this mark may be an indicator of a larger issue, perhaps the extractor or ejector. So, if you do as I advise, keep my last sentence in mind if you ever have ejection issues in the future.
So, this is my answer to the question. Some firearms can do this, not all. Speaking for myself, I'd ignore it. Maybe clean it off once a year. It'll not interfere with the proper functioning of your gun. However, if cleaned often you might begin polishing the finish on your gun which most folks would find undesirable. There is a slight possibility that this mark may be an indicator of a larger issue, perhaps the extractor or ejector. So, if you do as I advise, keep my last sentence in mind if you ever have ejection issues in the future.
