I am subbed to Larry's channel and saw this when it came out. LV is former Delta, the real deal and his channel has the best production values of any gun channel on YT. Well worth watching.
That was a awesome video of the functioning of the AR 15 rifle. I seen the one on the AK he did it was great also. There was so much detail to watch that I watched it a 2nd time just to make sure I didn't miss anything.