I am in the first stages of building an AR actually awaiting parts and was wondering how important the chrome lined barrel is ? I was told by a person who is an AR nut that it is not that important and actually a waste of money.
I only went chrome because the project concept was to have as close as possible to an off the rack A4 without the funflipper. When I toast this barrel I may or may not stay milspec, but it certainly seems durable.
I get it crazy hot several times every range outing, and at 11k rounds it shows no sign of group loosening. I can still put 10rds of fancy OTM into 2moa, with irons, same as the first trip to the range. And that's really about the limit of my skills, so I'm very happy.