[quote=@TGM]
I am a little puzzled that an assault rifle is her [i]sidearm[/i]. Seems like she's got a lot of weight on those back holsters.
[/quote]
The reasoning was a fallback weapon for close range. Phaeston pretty much fit perfectly: turian, high RoF, fluff mentions recoil dampers.
Carrying two or more long guns is neither unseen in universe nor particularly impossible, but I'll swap it out if it's a problem.