From experience:
If your shooting inside 300 yards you can shoot the rifle till your blue in the face with gas rings misaligned and you'll NEVER see it on paper.
At 600-beyond its a different story.
I spent three years in Iraq as a security contractor. My last year and a half was as the chief range officer for the Baghdad Embassy Security Force. I put over 60K rounds (three upper receivers worth) of ammunition through my M-4 during that time. I rarely cleaned it. RARELY means maybe (stress maybe) I wiped the bolt with an oily rag now and then.
I did however religiously lube the **** out of the thing with good ol CLP.
A direct gas operating system needs to run wet. Sloppy wet. If it does it'll be a rare event that it effs up. Dry it out cause you don't like slimy hands and you'll soon become proficient at immediate action drills to clear the stoppages/malfunctions.
Good luck.
C
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