User blog comment:Dragonzzilla/Mass Effect 3 Weapon Modifications/@comment-1388547-20120410224225/@comment-1888392-20120411004642

From what I read, the Ultralight Materials doesn't work for multiplayer and the Geth SMG burns through ammo like a -blam!-, so the Heat Sinks and Ammo mods may be the best for the Geth SMG. I was good with the Mantis during the Demo as long as I had cover and ammo, so I think the "Entrenched Hunter-Killer" approach is the way I play infiltrators. I guess I had decent luck because during the Demo, I got the Quarian Engineer (Golden-Rarity) on my Starter Box. I guess we'll see.