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8/5/2012 1:34:46 PM EDT
Hey guys, seems like i'm getting a brownish type mark on the inside of the ejection cover.  I keep her nice and lubed you think its brass from the casings or rust?  I know a pic would help but just seeing what you gusy thin.

Thanks
8/6/2012 3:08:09 AM EDT
[#1]
A casing will never hit the dust cover.  

Could rust or old oil turning brown.
8/6/2012 3:38:21 PM EDT
[#2]
My bet would be old oil also. Take your thumb and give it a swipe and see what happens.
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