Right now I'm lvl 60 and every one of my gear expect for my grenade is still lvl 50. Every enemy is still running from me thanks to the fact that Slag damage does x3 damage with other weapons now.
I use a DP Harold, Fire Infinity, and 2 Slagged Rubi's. Items I use are the Legendary Gunzerk mod, Sheriff Badge, Sham, and I recently found a lvl 58 Quasar that I use but before I was using a lvl 50 Slagged 0-Negative.
So if you want to attempt UVHM with Sal I recommend having at least a slagged Rubi and DP Harold, which if you have the Torgue dlc you can easily farm for the Harold at the Torgue machine and the Rubi from the Rakkoholics Anonymous mission from Mordacai.
Good Luck! --- Who gives a s*** what you believe? In thirty seconds you'll be dead, and I'll blow this place up and be home in time for Corn Flakes.