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Posted: 6/21/2010 5:27:33 PM EDT
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This is a new Noveske upper that I purchased a while ago. I noticed this discoloration on the barrel extension. I thought it was probably some type of factory grease or something so I cleaned it with CLP, lubed it with LP and put in the safe until now. I tried again today and it won’t come off with CLP. This is the first Noveske upper I’ve bought so I’m wondering if it is supposed to be this way? I’ve handles a lot of AR15s and never seen one that that looked like this. This seems to be the only place on the upper that looks like this. I will post a pic of a Colt M4 upper for comparison.
The first two pics look worse than it actually looks in person. The third looks fine. It actually looks in between the first two and third pic. It’s very noticeable in person. Thanks 
Colt M4: 
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It looks like a very light rust too me also but I think that area has to be hard-chromed so my guess may be wrong. Regardless if it is a slight rusting it located in a non- critical area anyway. Check the chamber and bore carefully and if that's good ta go then I'd not worry about it. Most likely it'll come off during your cleanings.
Impala 
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| I have had that in my LMT a few times, looks almost Identical. It is rust but a little WD-40 with a 3M scouring pad will remove it (plastic yellow and green one, do not use steel wool or something that will actually scratch it). As others have said it's only light surface rust so it will not affect the function of the firearm and if you keep it decently clean and oiled it will never be a problem. No metal, even hard chrome on stainless steel is impervious to rust. |
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Have you been shooting ammo that is lacquer coated? Almost looks like my chamber on my AK after shooting lacquer coated ammo. It reminds me of how lacquer coated ammo cases look except it’s a more rusty color. I thought it might be some kind of coating Noveske uses. This upper is unfired. It was like this when I received the upper so I tried to wipe it off with CLP (which is what I normally use to remove rust) but it didn’t come off. I put it in the safe until I could have enough time to deal with it. It doesn’t seem any worse than when I got it but I did clean it with CLP and lube with LP before putting it away. |
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Quoted:
This is a new Noveske upper that I purchased a while ago. I noticed this discoloration on the barrel extension. I thought it was probably some type of factory grease or something so I cleaned it with CLP, lubed it with LP and put in the safe until now. I tried again today and it won’t come off with CLP. This is the first Noveske upper I’ve bought so I’m wondering if it is supposed to be this way? I’ve handles a lot of AR15s and never seen one that that looked like this. This seems to be the only place on the upper that looks like this. I will post a pic of a Colt M4 upper for comparison. The first two pics look worse than it actually looks in person. The third looks fine. It actually looks in between the first two and third pic. It’s very noticeable in person. Thanks http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper005.jpg http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper010.jpg http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper012.jpg Colt M4: http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper020.jpg http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper022.jpg Do you have some sort of rust countermeasure in your safe? (e.g. goldenrod heater). |
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I'm not sure I can see it from the pictures (they look like I took my glasses off). John Noveske's SOP is to loctite the crap out of every AR he builds. The fine line you see where the barrel extension meets the barrel may be loctite that has cured.
If not they write songs about rust - it never sleeps. |
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Quoted:
Quoted:
This is a new Noveske upper that I purchased a while ago. I noticed this discoloration on the barrel extension. I thought it was probably some type of factory grease or something so I cleaned it with CLP, lubed it with LP and put in the safe until now. I tried again today and it won’t come off with CLP. This is the first Noveske upper I’ve bought so I’m wondering if it is supposed to be this way? I’ve handles a lot of AR15s and never seen one that that looked like this. This seems to be the only place on the upper that looks like this. I will post a pic of a Colt M4 upper for comparison. The first two pics look worse than it actually looks in person. The third looks fine. It actually looks in between the first two and third pic. It’s very noticeable in person. Thanks http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper005.jpg http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper010.jpg http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper012.jpg Colt M4: http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper020.jpg http://i285.photobucket.com/albums/ll54/Suprshootr/noveskeupper022.jpg Do you have some sort of rust countermeasure in your safe? (e.g. goldenrod heater). Yes, I have a golden rod. Quoted:
Is it a stainless barrel? If so the barrel extension may not be plated. The barrel is chrome. I called Noveske today and someone there told me older extensions aren’t finished but made from a stronger steal that exceeds Mil-Spec. He said that it corrodes so slowly that it could corrode for 100 years and still function fine. Newer extensions are phosphated. The phosphating looks different because of the type of steal the extension is made of. He believes this is what I have. |
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