Flash bangs start at 9:54. I can only we 3 objects hit the truck. No visible signs of it being a hail of gunfire. No dirt or paint knocked off passenger side of vehicle. Appears passenger side windows were shot out as well as windshield. I'd guess bean bags were used. Just a guess though.
Note: at ~13:20 you can see a red laser shining on dead body.
Sent from my HAL 9000
Reportedly they used flash bangs and then "Foam" bullets that had OC inside. That is new to me.