I
I would normally agree. But I've got a PSA 6.8 upper that needs to have carbon scraped off the bolt's tail every 300 rounds for it to run without stoppages. Only AR I own that does that too. CATM-4 tool is what I use. They sell them on Amazon.
Don't bother. The carbon helps seal the gas, and unless you are shooting hundreds of thousands of rounds in FA daily, carbon buildup will never be an issue.
Lube it up and shoot
I would normally agree. But I've got a PSA 6.8 upper that needs to have carbon scraped off the bolt's tail every 300 rounds for it to run without stoppages. Only AR I own that does that too. CATM-4 tool is what I use. They sell them on Amazon.
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