The gun...well let's say it exploded in a spectacular fashion, an explosion blowing the gun to smithereens, as both scrap and blood made their way between the three. His arm was off, literally thrown across the room, leaving the Krogan to glow blue, and launch a straight torren of what seemed to be blue energy. [spoiler]You did say all out...I'd say he had biotics. Which should be easy to deal with.[/spoiler]