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Hi guys. This is on a new DD upper I just got. Just wanted to make sure this isn't rust. It came off easily with a q-tip soaked in solvent. I suppose it could easily have been factory preservative and/or fouling from factory test firing. Easy spot to miss after the test fire cleaning. I've seen Colt's factory preservative and it didn't quite look like this.
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It came off with a q-tip soaked in solvent. Does it really matter in the overall scheme of things?
Patriotism means to stand by the country. It does not mean to stand by the President... - Theodore Roosevelt, Lincoln and Free Speech, Metropolitan Magazine, Volume 47, Number 6, May 1918.
Every Communist must grasp the truth. Political power grows out of the barrel of a gun. Our principle is that the Party commands the gun, and the gun must never be allowed to command the Party Mao Zedong, 6 November, 1938 - speech to the Communist Patry of China's sixth Central Committee
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It probably doesn't matter, and it's just a flash hider after all. There was a little rusty stuff in the receiver extension too. Sorry, I know it sounds kind of silly. I'm relatively new to ARs and guns in general.
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