ok, so i have my model all up and ready to go, but te tris count is way too high. is there a simple way to lower this without destroying the model?

ok, this helped a ton but now i have aa problem with model viewer. whenever i try to open the model, when i get to the file that the model and components are in and try to open it, modelviewer freezes and crashes

it keeps saying that my game configurations are invalid or missing. can someone please tell me their filepath or anything else they think might fix it?

i would like to start making weapons for so when valve adds back in the ability to upload weapons to tf2, ill have a bunch of ideas/designs and experience, but i do not know how to make the parts move for things like reloading and such. can anybody help me?