Juno is going to take the opportunity to look over the gun that he's handed because of course he is. It's a little more interesting with the THEIA Spectrum at his command too, because it means he can analyze the thing for energy signatures. That's roughly where he stops, because taking the man's gun apart without asking is a little beyond even Juno.

But holding it did make him feel a little more comfortable giving up his own gun to examination, even if Gavin's gun is like something from old earth.

"It doesn't look like anything at all in a person. It's about energy transfer."