>>96120467
Weapons that get worn down by repeated use but are still constantly in use by professional soldiers don't get rusty, though, because the soldier will be smart enough to take care of his rifle. Only way a weapon is getting that rusty and being used is it the soldier had to scrounge some abandoned armory for it.

No, when a weapon gets properly worn down but is kept clean, it starts turning chrome. Should look more like pic related.