I just gave my new Colt Competition (blued version) it's first cleaning and noticed the circled spot on the attached pic. Is this something to worry about? It won't come off and it doesn't feel any different than the rest of the slide.
yeah, what i would say. i bought a colt sxe a few years ago and the brass ejected back into my face. some would bounce off the slide in the location you show and leave brass marks. the ejector needed a tweak. i just called lew at bec from the range and brought it right in. he adjusted the ejector to where it should have been. he had it 2 days which was better than sending a new gun back to colt for 2+ weeks...but warranty from colt would have cost nothing. lew cleaned up the marks so you'd never tell there was an issue.