i totally get that the m14 isn't for everyone and it isn't the "greatest rifle in the world" but the guys who ran that test , starting in video 1, let thier disdain for the m14 show and it continued thru the whole series of videos. Thier decision to choose , and offer to thier shooters, a traditional stocked, 22" barrelled standard flash hider unit when other options sharing similar characteristics in ergonomics with the pistol gripped rifles it was stacked up against are clearly availlable and extremely popular with todays M14 enthusiast.
it's a cool set of videos but the bias against the m14/m1a was very clear and the reason they loaded it out like they did.