Do you know if Ballistic Advantage dimples the barrel for gas block. I have read they do and then some say they don't. Sent an email out to them but figured I would ask here. Thanks
Hmm... Been a while since I built the 6.5CM upper with their barrel. If I recall correctly, they did. However, not all gas blocks are the same so with or without a dimple still takes some caution. Gas blocks 'should' be at the correct distance when resting against the barrel shoulder at that point, but I've seen one or two that were off a little- not the Ballistic Advantage, was something cheaper. One 'cheat' is use a length of thin copper wire to make a feeler. Might not reach for a really thick barrel but usually helps.