*EDIT* Nevermind, I'm just gonna use it. Time to stop hoarding CE/Cr...
http://i53.tinypic.com/11i08ix.jpg
http://wiki.spiralknights.com/Blitz_Needle
Imo, this is one of the more underrated weaps in the game. The fact that you stay still while shooting is mitigated by the awesome range this Needle line has. You can comfortably fire from long range and do big damage.
It absolutely murders Trojans, Fiends, and Beasts. The trojans in Citadel literally took 2-3 quick bursts to take down solo with the FOUR star version of this. Also works with the fire zombies in Citadel since undead are neutral to piercing. I've been soloing Citadel with just Leviathan and the 4 star Strike Needle as weaps.
That's my sales pitch. I'm not 100% sure I'm gonna sell yet... might keep for my equip, depends on price. IGN = Green-Lantern
Oh and it's also a lot of fun to use. And nobody makes these or uses them so you'll have that unique factor..lol
If you end up with another one that has speed like that, tell me. I'd be quite interested.