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10-03-2013, 08:21 PM
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Dents inside my M & P 9c Slide!
What are these? Only 250 rounds and I notice these perfect round "dents" inside the slide! Did I just miss these the first two times I cleaned the gun?!
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10-03-2013, 08:31 PM
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I have the same on my shield but i have 5 dimples. I thinks its a way for S&W to record how many shields they make and the date time frame. Much like the serial # Also i think it has to do with what type steel they use and when they make changes to the gun. Seems to me i read that soemwhere on this forum. I am sure someone more knowledgeable will chime in soon
1SG
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10-03-2013, 08:34 PM
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I asked about those a couple of years back or more. The guys at the S&W booth at the SHOT Show said they are code markings allowing S&W to identify which sub-contactor machined that slide.
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10-03-2013, 08:45 PM
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Ok...these answers make sense, but I still wonder how I missed them my first two cleanings! I even ran my finger inside the slide to apply a little protectant and did not see or feel them until today's cleaning. Maybe there was some sort if compound filling the holes. Oh well, thanks for the responses thus far!
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10-03-2013, 10:02 PM
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Braille for "Eat Mor Chikin!" 
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10-03-2013, 10:15 PM
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It looks like Braille
Quote:
Originally Posted by shawn mccarver
I asked about those a couple of years back or more. The guys at the S&W booth at the SHOT Show said they are code markings allowing S&W to identify which sub-contactor machined that slide.
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They look like a pattern of 6 dots which could produce a goodly number of distinctive patterns or 'letters'. I guess they didn't want to engrave actual letters because it might give away secrets, like maybe Ruger manufacturing the M&P slides.
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10-03-2013, 10:19 PM
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My understanding was that it marked what machine the parts were made on. So if a problem came up it could be traced back to that machine.
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10-03-2013, 10:20 PM
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A dent will show up about every 50 rounds. The compound that fills the holes slowly dissipates at a set rate. You actually have dozens of holes in the slide, but the compound in each hole will wear away at 50 shot intervals.
So your slide has 5 holes, and about 250 rounds through it. I have a newer Shield my wife uses and it only has about 150 rounds through it and I can just make out the third dimple showing up now.
An old M&P I have is so full of holes, I had to increase the recoil spring because the slide was so light. S&W will replace the slide when it gets too bad I hear.
Good luck and happy shooting!!!
.
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10-03-2013, 11:36 PM
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Call the exterminator. I suspect the steel moth...
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10-03-2013, 11:47 PM
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Ok...thanks for the feedback! Glad to know I was not going blind or crazy. I knew I would have spotted them from the start, so I could not figure how they would just appear all of the sudden. Thanks!
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10-04-2013, 12:15 AM
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Your M&P had a severe form of acne during it's teenage years.
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10-04-2013, 12:09 PM
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Relax.
Those markings identify the CNC machine, operator and date of manufacture of the slide, allowing S&W to track any QC issues that might occur during manufacture and be identified at a later date.
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10-04-2013, 01:15 PM
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Quote:
Originally Posted by Fastbolt
Relax.
Those markings identify the CNC machine, operator and date of manufacture of the slide, allowing S&W to track any QC issues that might occur during manufacture and be identified at a later date.
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What about the filling compound that wears away?? I can't believe they would drill holes in a perfectly good and new slide just to remember who made it... I mean they have serial numbers they can check and all.
No Fastbolt, you are a smart man, and you have all those armorer degrees and all, but you really dropped the ball on this one.
Self-dissapating metal filler compound is the answer. 
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10-04-2013, 02:55 PM
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Quote:
Originally Posted by Lost Lake
What about the filling compound that wears away?? I can't believe they would drill holes in a perfectly good and new slide just to remember who made it... I mean they have serial numbers they can check and all.
No Fastbolt, you are a smart man, and you have all those armorer degrees and all, but you really dropped the ball on this one.
Self-dissapating metal filler compound is the answer.
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Oops.
That's what I get for listening to the S&W techs & engineering staff.
When will I ever learn? 
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10-04-2013, 04:55 PM
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Quote:
Originally Posted by Fastbolt
Oops.
That's what I get for listening to the S&W techs & engineering staff.
When will I ever learn? |
They are just throwing you off the track... 
The OP nailed it when he said there was a compound in the slide, I just added the self-dissipating part.
The things you can learn here.....
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10-04-2013, 05:30 PM
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Quote:
Originally Posted by Lost Lake
A dent will show up about every 50 rounds. The compound that fills the holes slowly dissipates at a set rate. You actually have dozens of holes in the slide, but the compound in each hole will wear away at 50 shot intervals.
So your slide has 5 holes, and about 250 rounds through it. I have a newer Shield my wife uses and it only has about 150 rounds through it and I can just make out the third dimple showing up now.
An old M&P I have is so full of holes, I had to increase the recoil spring because the slide was so light. S&W will replace the slide when it gets too bad I hear.
Good luck and happy shooting!!!
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This really is good stuff! Gotta love it 
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10-04-2013, 05:51 PM
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Quote:
Originally Posted by Etemmu
This really is good stuff! Gotta love it |
Thanks for 'getting it'.
.
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10-04-2013, 05:54 PM
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I was waiting for someone to jump all over that like you were serious!
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10-04-2013, 05:56 PM
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Quote:
Originally Posted by Lost Lake
A dent will show up about every 50 rounds. The compound that fills the holes slowly dissipates at a set rate. You actually have dozens of holes in the slide, but the compound in each hole will wear away at 50 shot intervals.
So your slide has 5 holes, and about 250 rounds through it. I have a newer Shield my wife uses and it only has about 150 rounds through it and I can just make out the third dimple showing up now.
An old M&P I have is so full of holes, I had to increase the recoil spring because the slide was so light. S&W will replace the slide when it gets too bad I hear.
Good luck and happy shooting!!!
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Wow, I have an M&P 9mm, and I just looked at the inside of my slide. I have three dimples/dots, but I have around 700-800 rounds through it. I clean my gun after every shooting and never noticed the dimples. What else am I missing..Maybe I should wear my reading glasses when cleaning..lol..
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10-04-2013, 06:51 PM
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Quote:
Originally Posted by Wolfman-Iraq
...Maybe I should wear my reading glasses when cleaning..lol..
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Dunno. Depends how soon you want the gun to look clean to your eyes.
That's why I find blue/black finishes, and black plastic frames (versus grn/brn), look cleaner, sooner. :P)
Of course, when I use the magnifying lamp at my bench, I can be at cleaning for longer than when I just use my unaided eyes, or even when using my reading glasses. 
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10-04-2013, 06:57 PM
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Wait! Are you guys serious about being able to clean guns? I've just been throwing them away when they get all filled up with crud!
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10-04-2013, 07:30 PM
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Quote:
Originally Posted by jonesy814
Wait! Are you guys serious about being able to clean guns? I've just been throwing them away when they get all filled up with crud!
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No, we're talking about being able to see..lol
But I like your approach to cleaning......
Last edited by Wolfman-Iraq; 10-04-2013 at 07:33 PM.
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