[quote=@Reaper]
Wait, we're the [i]7th[/i] MAS Squadron. What happened to 1st through 6th?

Also, [i]there is no sound in space.[/i]
[/quote]

Alexis was a member of the 2nd before taking on the role of Captain.

As for sound. Think of it as the shockwave of the weapon and impact hitting you or the vessel you're surrounded by. It's -that- kind of loud.