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So my new M4 arrives, I pull off the handguards, and what do I find?


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The finish of the gas system is splotchy and uneven, it's not anything I can clean off, and a light film of oil doesn't change it in any substantial way. Does anybody have any ideas as to what may be the culprit? Does any soldering go on in this area? Could that be the problem? Thanks in advance for the help.







Edited by ianjbs
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Call CS and show them your issues if you want them fixed? It does look like something went wrong and probably should have not been sold in that condition. But on the other hand tear down a Ruger Mini 14 and see what the barrel looks like next to the gas ports on a brand new rifle. I would be ashamed to show it and from what i have been told by owners that have had them for 20 to 25 years is that this is normal. What i am talking about is much worse than what you have pictured! It does nothing to affect the operation of the rifle and is hidden and looks like grinding was done on barrel but it does not rust and is outta site so i am ok with my issue but totally understand you have a finish problem that needs to be talked about with CS. Good Luck!

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