[CaptainMorgantown]

Where did he learn to shoot this well? Handgunning isn’t a ‘natural act’ and its pretty clear he was a good shot. I doubt he acquired this level of skill in a couple of weeks.

South Korea has compulsory military service. By that age, he will have served in the South Korean military for a year or two.

[Jedi Master Pikachu]

Except, as was pointed out already, he came here when he was EIGHT.