Can you gain weapon levels from kills in party game modes?

#1Gallis_OTKPosted 12/8/2012 12:27:48 AM(edited)
Like unlocking attachments for the Crossbow through Sticks and Stones or leveling the B23R by using its tactical knife in Gun Game?

EDIT: And what about the KAP-40 through One in the Chamber?
Not changing this line of my sig until (The) Ryback's hunger is satisfied - started 9/24/12