For modular weapon parts like scopes and suppressors, is there a version of each weapon for every configuration of modules, or are the models in game actually modular?

Yeah, so we have an item port system. We place helpers on the weapons. In this case, you can customize it. And you have the points there, the attachment points, where you can actually put a different model. So you can put a laser pointer on it or a flashlight at the front. Not every weapon supports suppressors or muzzle brakes. But in this case it works, because it's a ballistic weapon. But some weapons are just too big, or are not the kind of weapons you would put a silencer on.