but I'm pretty sure the .38 special refers to the cartridge and not the gun so whatever
You are correct, and a .38 Special is a small cartridge.
My review of your set:
The .880 special isn't a bad replacement. More damage for a smaller cylinder size.
The rapier is a stupid idea. It doesn't even offer another style of play, it just makes the spy less capable of doing his job, completely defeating the purpose of the spy. He's not a combat class, his primary attack is to knife and run, taking away his ability to deal a backstab makes him almost worthless. You backstab someone with the rapier, and it does damage, which is cute, but then they've turned around and you are dead.
The laser watch is semi-neat, but overall useless. By the time you start firing the laser, you're already dead seeing as it increases in damage over time, and because of the rapier you can't disguise or backstab any enemy.
Overall the set isn't well thought out at all. You didn't consider how the spy is supposed to be played or his role on the team. Even the revolver is a generic "sacrifice X for damage" weapon.