Any scout rifle with outlaw and firefly is AMAZING. However, the explosive rounds kill it for me. They make you do LESS damage unless two targets are hip to hip, it can render the bodyshot damage as the kill and not trigger firefly or outlaw, and there are also many more middle perks that could benefit you more than one that can hurt you. [spoiler]BTW I've had three scout rifles with outlaw and firefly and I can say there are by far my best primary weapons except for some raid and exotic weapons. One of them had explosive rounds so I tried it out but personally I didn't like it.[/spoiler]