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Yesterday 11:55:48 AM EDT
Took the SR-15 out to sight in the acog and noticed what appears to be surface rust under the rail on the gas system.  The gun isn't exposed to adverse conditions and is kept in a dehumidified safe.  Does this rust (if that's what it is) indicate an issue with the gas system? Does it need to be addressed?Attached File
Attached File
Yesterday 12:15:55 PM EDT
[#1]
I would contact the mothership.

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nothing is absolute
Yesterday 2:15:51 PM EDT
[#2]
Mothership contacted.  One KAC contact advised me to rub some oil on it to keep it from spreading but said it was not from any gas system leak. There was a caveat that said, "we can take care of it for you".  So I asked, if it only requires some oil and there is no leak, what would KAC do to "take care of it for me". No need to send it in if a dab of oil is the solution.  KAC followed up with "if you send it in, we could replace the affected parts".  So that sounds like a little bigger deal than put a drop of oil on it.  So I guess off to KAC she goes.
Yesterday 2:38:29 PM EDT
[#3]
Hopefully just a castle nut swap.
Yesterday 6:11:06 PM EDT
[#4]
Phosphate barrels require oil other wise the phosphate coating provides almost zero rust inhibition.
Yesterday 6:58:55 PM EDT
[#5]
would it not be advisable to use a brass wire brush to remove the rust and then coat with oil?
Yesterday 9:03:11 PM EDT
[#6]
This is a $3k rifle. OP did not pay a discounted price for a blem. KAC is happy to fix it. Id let them. Just my .02. KAC warranty work is very quick and responsive in my experience. They stand behind the product, and thats part of what you pay for when you buy KAC. Competent support logistics.
Yesterday 11:27:05 PM EDT
[#7]
I would send it in as is and not try to clean and oil first. It's odd to me that the rust is only in on one part...
Yesterday 11:53:38 PM EDT
[#8]
THIS !!!

Quote History
Originally Posted By JohnDough:
This is a $3k rifle. OP did not pay a discounted price for a blem. KAC is happy to fix it. Id let them. Just my .02. KAC warranty work is very quick and responsive in my experience. They stand behind the product, and thats part of what you pay for when you buy KAC. Competent support logistics.
View Quote

My wife says I'm totally useless..that's not true.. I can be used as a bad example
Today 12:04:52 AM EDT
[#9]
This sounds like a good plan
Today 4:07:52 PM EDT
[Last Edit: Video][Edited] [#10]
That nut has to be a different grade of steel. The gas block it self I believe is stainless steel.
Today 4:23:37 PM EDT
[#11]
It’s rust, I’ve had good luck with KAC taking care of it.

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