Tell us cool stuff to look for, avoid, etc.
I have a fully upgraded Shingen-E with the "Stability increases the longer you fire it" modifier and it kicks ass in pvp. I think its flavor text is something like: "This superb rifle was made to pop skulls." I also like the Cydonia AR in pvp. In beta, the Galahad ARs kicked ass, but I havent seen one in the live game. Has anyone?
Although I love them in pve, the 60+ clip size bullet hose ARs (Sahara and Eclipse, etc) are not accurate enough for pvp.
I use pulse rifles on more open pvp maps. I havent used a scout rifle yet even though that is mostly what I used in Beta. I did get a legendary SR last night, (upgrades to 300 damage) but I havent used it yet.
I got two blue handcannons crafted by "Tex Machina" that have really awesome stats. One has an 8 shot clip, the other has 9. I havent used any handcannon in pvp yet, but they completely own in missions.