Playing Doom, it always bothered me a little that you can't pick up the riflezombie's weapon. Instead, he leaves ammo for your pistol. So, naturally, 21 years later, I decided to try making a mod to scratch this itch. Still no luck importing the new weapon to the game itself though, under the hood of Doom it seems adding weapons isn't quite as easy as adding new textures. Oh well, off to Doomworld.com to whine about it there.
Update: And its working. Forgot the old markings for adding sprites, SS_START and SS_END. Wad attached for your Doom'ing pleasure.