This mod adds the Walther PPQ to the wastelands, with an assortment of weapon mods. It can be bought from vendors, or found on the corpses of raiders, Gunners, and various other enemies. If you don't feel like buying or finding one, there is now a safe in the players home from before the war that contains the gun. As far as modifications go, you have standard magazines, large magazines, and quick eject versions of both standard and long magazines. There are also various receiver mods that either improve accuracy or damage, as well as extended slide versions of all receiver mods, and just as any Walther should be, this weapon also has a suppressor modification.

EXCLAIMER: Sadly I the way I had all the mesh files set up, the barrels are separate from the gun and slide itself. The reason this is a problem , is because when you have the extended slide with the standard barrel, the barrel doesn't go all the way to the end of the slide. As long as you don't pay attention to it, you wouldn't really notice a problem with this, that is until you slap a suppressor on it. Since the suppressor is attached to the end of the barrel, the suppressor will end up clipping through the slide. I couldn't really find a way to fix this, so what you have to do is if you plan on using the extended slide with a suppressor, you have to also have the extended barrel as well.

TL;DR: If you want to use the extended slide, you have to use the extended barrel, otherwise you get clipping issues with the suppressor.
ENB used is PRC Camera Preset - Ultimate Immersion (with some tweaks, see images for exact in-game settings.)