How to get 'The Sleigher' in The Division 2

[Windows Central]

'Tis the season to be jolly and fire snowballs at bad guys on the streets of D.C. What?
As of December 10, Ubisoft's latest content drop comes to The Division 2 in the form of Title Update 6.1 with a brand new seasonal event. Situation: Snowball is live through December 31, with an accompanying apparel event known as Silent Night.
Included in Situation: Snowball is a brand new, seasonal exclusive weapon known as "The Sleigher." This is no ordinary weapon, firing snowballs instead of bullets, and causing enemies to become confused. Confusion is probably an accurate response given the serious nature of life in The Division 2!
Here's how you get it.

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