Railer

root@dahl-db:~$ cat description.txt

Railer sniper rifles fire much faster than most of their class, spending 2 sniper rounds per shot to launch piercing rounds that can ricochet off surfaces. They hit hard for the rate of fire, but their critical-hit penalty makes them poor choices for traditional crit-stacking sniper play. Instead, they work better as aggressive, unconventional rifles for characters who care more about raw output or elemental pressure than perfect headshots.

root@hyperion-db:~$ cat notes.txt

Random world drop from suitable loot sources. Zer0's B0re does not trigger because the Railer already pierces, which prevents B0re from applying. Gaige's Close Enough can activate after a shot passes through a target; it cannot hit the first enemy again, but it can bounce to and damage others normally.