Favorite Weapon and Why?

I know this has been posted before, but according to my searches that was a few months ago. So what is your past or present favorite weapon and why? Maybe this can help others find something they have been looking for in a weapon. Even if your favorite weapon is a really common one, maybe you like it for interesting reasons.

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Currently my favorite weapon is the Pyrana Prime. It has a nice feeling to it when I use it. The ability to go full auto is really nice, and when I activate the ability to double up the weapons after 3 kills it shoots so fast and is so awesome feeling. Also its really neat when you are holding something in your off-hand and the phantom gun still appears and you are just wrecking everything with two guns and a mobile defense key in your hand. So cool.

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How about you all?