I'm not sure if anyone else mentioned this but I found that Grizzlies are very weak against the jeep's turrent, especially in maps like basin where you can shoot on a hill from a distance. I managed to get about 5 kills in a row doing this until they decided to move on.
If your a trooper and a grizzly is chasing you, find a rock or anything else that's big enough to cover your body so it can't see you. Once you're there, throw down 2 proximity mines (make sure the grizzly player cant see them behind the rock. Start firing at the him with the kinetic rifle. 9/10 the grizzly player will come after you behind the rock thinking your helpless.Wait for him to charge you and slowly back up. Once he gets to you behind the rock hell have two mines waiting for him and it'll be too late to do any thing. This trap works with other vehicles too. Just use the appropriate amount of mines. P.s. sorry if anyone else already posted this.
Im not the best but Im better than most. Currently ranked in the Mid 40's Excellent Sniper All around good player Looking for a regular clan.