Quickest way to get Arbalest?

[clever gazelle]

Want to get the catalyst before xur leaves but dont have the weapon...

[stuck swift]

There's a new quest for it iirc, check the quest archive kiosk in the tower or helm

[rapid creek]

if u own TFS, go to shaw han in the cosmodrome, else, monument of lost lights

[half gale]

so basically, check shaw han

every dlc he just has a quest for arbalest thats really easy to do