[Garrus stands back up to follow Red when he moves, letting him pull out the gun and nodding when Red says it's his.]

And the best way to make it clean, make it be painless, is to learn how to use this.

[Which is why the boy's here.]

Take a seat, Red. First thing I'm gonna teach you is the gun itself.

[He grabs the duplicate one and slowly starts taking it apart, piece by piece, taking the time that Red can copy him.]

To know a weapon is to know all its parts. Know how it works, why it works, know how to clean it and take care of it. When you can break it down and build it back together you have an understanding of it, and then you can respect it.

[They'll need to get to firing, sure. But Red's upset as it is. Garrus wants to build up slowly, not break the boy.]