A Five-seveN gun mod for Receiver 2
Also check out: MagLoaderThing, this un-cuts a thing in the Compound that makes reloading big magazines a breeze
And this as well, it adds ammo boxes for modded cartridges in the Compound, with possibilities of adding custom models for them too (like this gun has)
If you run into an issue, create an issue in the Issues tab on GitHub, with a screenshot of your problem and your player.log file, located in your %UserProfile%\AppData\LocalLow\Wolfire Games\Receiver2\ folder or equivalent for your OS.
(You can watch this video guide in case something isn't clear)
Go to the debug menu, and start the custom campaign, or go to the debug menu and spawn the gun + mag in.
Szikaka for all their precious help, and also for the modding kit Wolfire for this masterpiece of a game me (Ciarence#6364) BSG for the models and sounds and textures and not being able to spell Reciever correctly