This guy has caused a minor controversy by shittalking the ever-reliable 14.5 AR barrel length(also sneaks in an AK diss at the end).
His reasoning(speed and maneuverability vs range effectiveness for the average short-range engagement) isn't completely retarded, with that said recommending 10.5s to "70-80% of people" is touched. Personally I think its just because he's a manlet.
As someone who uses public ranges, I have a deep seething hatred for influencers/guntubers/trainers who push new shooters to buy the shortest length possible.