Here's a few clips from my PvP session last night. They're both from the "Control" game mode on the map "Blind Watch," though I can't remember if they were from the same match or not.

It took me a while to find my first sniper rifle, but it's been an asset ever since. I've picked up a few new ones since that first find, but because of the way weapons are normalized in (most) PvP game modes, any sniper rifle should suffice.

https://www.youtube.com/watch?v=72sNZXXlso4

Nova Bombs are great in player-vs-player matches. They provide a virtually guaranteed instant kill for any opposing players within the blast radius.

https://www.youtube.com/watch?v=CHl6Oq8Xgis