Doom mod weapon showcase: Operation Apollyon 1.7
Believe it or not, this is LossForWords' first publically available mod! While it might show, it's also a pretty fun (if slightly OP) weapon set with plenty of cool guns and some of his work's tropes - including the attention to detail in regards to fire-based weapons!
This is the newest version, which has some new weapon graphics and QOL changes (I think).
Sourceport: GZDoom 4.11 - https://zdoom.org/downloads
Map: Shooting Range - https://www.doomworld.com/forum/topic/135569-zdoom-shooting-range-a-small-map-for-testing-guns/
Mod list:
Operation Apollyon v1.7 (GZDoom) - https://forum.zdoom.org/viewtopic.php?t=69741
Damnums (damage numbers) - https://forum.zdoom.org/viewtopic.php?t=55048
A floppy disk full of MIDIs (music randomizer) - https://forum.zdoom.org/viewtopic.php?t=47189