Back away from the Dremel tool idea, it has no business being anywhere near feed rails. Use a fine stone or a fine piece of Emory cloth to break the sharp edges. Just enough to where a cotton swab won't snag. Afterwards, wash the area real good to get rid of any abrasives.
Lock, Stock and Barrel gunworks
SLC, Ut
USMC 69-73
"This is my rifle, there are many like it but this one is mine. My rifle is my best friend, it is my life."
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