Screenshots of what you're doing.

We want a consistent art direction for stock models and weapons, so that the weapons have the same style is actually not a bug, it's a feature ™.

I also like that every weapon looks really powerful. Because in Xonotic, all weapons are quite similarily powerful. That makes perfect sense to me. With powerful looking weapons I fear if we make them significantly smaller then they would look more like toys not like heavy gear. I consider it also a good thing to recognize from distance which weapon an opponent is wielding. Personally, I would just implement the "simple items" weapon symbol's color scheme or maybe even the symbol itself into the model so that they are easier to tell apart from each other, especially regarding dropped weapons or spawns.