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View Full Version : What is this flaking off inside my M&P 15?


schwaggy
08-20-12, 14:29
During cleaning, I noticed this stuff flaking off the inside of my receiver. Low round count on this rifle (700rds) as I use it seldom for coyote. But, I certainly didn't notice this stuff flaking the last time I cleaned it. I am using TM solution on the bore and finished off with some SLIP EWL.

Anybody know what this crap is?

Thanks!

http://i1059.photobucket.com/albums/t439/schwaggyboris/IMG_2396.jpg
http://i1059.photobucket.com/albums/t439/schwaggyboris/IMG_2399.jpg
ASH556
08-20-12, 14:33
That's a high friction/high heat area where the BCG rides. Looks like whatever green stuff you coated the receiver with is wearing off.
schwaggy
08-20-12, 14:40
That's a high friction/high heat area where the BCG rides. Looks like whatever green stuff you coated the receiver with is wearing off.

That green is factory anodized, I didn't do anything to it. This is the Cabelas special edition of S&W's Performance Center M&P 15 which also comes in black and RealTree. Look closely and you'll see the receiver is green under whatever this grey gunk is...

I'm curious if I should find something to dissolve it completely and just get it all out of there. I also wonder if it was the TM Solution bore cleaner...
Moltke
08-20-12, 14:45
Contact the manufacturer...
markm
08-20-12, 14:47
Isn't it just that dry lube film that's in the receiver? :confused:
VIP3R 237
08-20-12, 14:55
Isn't it just that dry lube film that's in the receiver? :confused:

That is what it looks like to me.
The_Count
08-20-12, 15:00
Isn't it just that dry lube film that's in the receiver? :confused:

Yea, It was anodized then the dry lube film was applied (spray in). I wouldn't worry about it. Just lube as usual. Dry lubes wear out eventually. You're noticing it more because of the green anodizing.

TC
Reagans Rascals
08-20-12, 15:04
exactly which area is the flaking?... the green or the greyish area?

as in... is the grey area flaking away and showing the green, or the inverse?

it seems like its the anodizing coming off the inside of the receiver...

ETA: that's the dry lube film coming off and showing the anodic coating... you're fine... just add lube
schwaggy
08-20-12, 15:26
Sweet. Thanks guys.
I'll carry on.
ra2bach
08-20-12, 15:46
dry lube. don't scrub that area too much or you can take it all off in one go...
schwaggy
08-20-12, 15:51
dry lube. don't scrub that area too much or you can take it all off in one go...

Totally, although if I keep it lubed with what I typically use, I suppose there comes a time when it's not needed. This rifle has seen limited use and I have a feeling the dry lube JUST started flaking after this particular cleaning session while using TM Solution. The interesting thing is that I didn't notice any increase in gunk as I cleaned - almost as if the dry lube which did flake off disappeared without a trace. I had never seen dry lube applied from the factory like that before. It's certainly not in my other AR's.
mtdawg169
08-20-12, 19:50
Totally, although if I keep it lubed with what I typically use, I suppose there comes a time when it's not needed. This rifle has seen limited use and I have a feeling the dry lube JUST started flaking after this particular cleaning session while using TM Solution. The interesting thing is that I didn't notice any increase in gunk as I cleaned - almost as if the dry lube which did flake off disappeared without a trace. I had never seen dry lube applied from the factory like that before. It's certainly not in my other AR's.

Most upper receivers will have a dry film lube applied on the inner surface.

Sent from my DROID RAZR using Tapatalk 2
Suwannee Tim
08-20-12, 20:10
That's a high friction/high heat area where the BCG rides......


It is neither high heat nor high friction. High heat is several hundred degrees F. High friction is brake pads on a rotor. The AR upper is neither.
devinsdad
08-21-12, 10:29
Nice looking rifle, whats the length of the barrel?
schwaggy
08-21-12, 10:52
Nice looking rifle, whats the length of the barrel?

It's 20" - here's a link to the rifle as stock from S&W. The green was only available from Cabelas: http://tinyurl.com/9dfzwd5
og556
08-21-12, 23:03
It's the dry lube. Same thing happened to my first Noveske. I called them and after they laid down the science it was all good. Totally normal just keep her wet.
MegademiC
08-23-12, 00:23
My gun also did that with standard black anodizing. Its becoming more silver inside, but still slick so Im not worried.


... just keep her wet.
And this is just downright good advice.
bp7178
08-23-12, 01:23
Low friction coating, it will come off with any acetone based degreaser.

The low friction coating is stupid fragile. Why companies spray it in uppers when it would stand up to a cleaning solvent is beyond me.