He started with an "assault duck-hunting shotgun", then offed the policewoman, acquiring her pistol and long gun.
I presume the long gun was some sort of semi-auto.
Update: 22 PEOPLE KILLED IN NOVA SCOTIA RAMPAGE
April 21, 2020
https://www.freerepublic.com/focus/f-news/3837746/posts
So he stole the murder weapons from a cop? Well heck, they ought to make that illegal!