the M41A Pulse Rifle from Aliens as a mod for Vanilla Doom
M41A Pulse Rifle From The 1986 Sequel: Aliens (This MOD Was Extracted From A MOD I Found Online & After Multiple Tries, I Was Able To Get Working Properly Thanks To The Program Slade 3)
Note: this one was harder to get working properly and I've tried to get the proper sound effects for it to work consistently. so, unfortunately, I was not able to use a different sfx for what I can only assume is supposed to be the grenade launcher as it's 2nd mode.