Grenadier

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

An assault rifle that fires arcing, grenade-like explosive rounds instead of standard bullets. The projectiles bounce off surfaces and only detonate on hitting an enemy or shortly after coming to rest, so the weapon rewards indirect shots, banked angles, and careful spacing more than normal rifle aim.

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

It only appears at green rarity or higher. Explosive versions benefit from Duty Calls, while non-explosive elements do not. It also sells for much more than most assault rifles of similar level and rarity. Its projectiles can be absorbed by absorption shields and converted into rocket launcher ammo rather than assault rifle ammo. It is a world drop from suitable loot sources.