I have excluded Hawkmoon because it's and exclusive.
Most people will probably say Gjallahorn or Ice Breaker, and other people will probably have a go at me for not putting their favourite exotic on the list. I'm sorry ok!
EDIT: I made this pre-update. This is what I used to view as the best weapons in the game. I wish I could change polls but I can't.
EDIT 2: I don't know why people think Invective's regenerating ammo perk is so bad, it's like a slower version of icebreakers but you can still pick up ammo off the ground
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My personal favorite is Red Death. Be it pvp, pve, or a raid, Red Death has never failed me.