I stopped playing the pvp after they kept nerfing our cards.
You spend $950 on a card and upgrading it, then they change its effects making it useless, that was it for me, I dropped out and havent gone back.
But in showdown, the best combo was double barrel shotty and Paint it black, deadly combo.
Also dual sawed off's at close range are devastating.
Anything with exploding rounds works great, I like the Springfield, but others prefer the bolt action, the Springfield is faster to reload and more powerful.
Lastly the Lancaster was the best rifle for pvp when I played, I tried them all, but alwasy came back to the lancaster.
I wasnt very good, I did win several rounds and got mvp many times, but whenever we played any other mode where you play as a team it sucked, noboday uses a mic and works with you, so it is just chaos, not my kind of fun for a multiplayer, so I just stopped.
I dont miss it.
A double barrel and Paint it black in large showdown was a sure way to do very well though, IMO