I couldn't find any thing on a google search that listed these, so I made one because I keep getting confused with the weapon silhouettes in the quests.
Hope it helps someone: https://i.imgur.com/29G9UbD.png
by request (2 grenade launcher version): https://i.imgur.com/up9mTq2.png
-
Thorn and malfeasance have their own silhouettes, if you notice when you equip them.