The weapon models are actually the stock Quake II models/textures except in the case of the first one, which is the model included with the custom mesh. These are technically freely available through the Quake II CTF demo, but fair warning if you attempt to use these in your project.
This was a custom player model made for Quake II multiplayer, and it is used by some players today.
Readme for the model: https://github.com/mrdoob/three.js/blob/master/examples/mode...
The weapon models are actually the stock Quake II models/textures except in the case of the first one, which is the model included with the custom mesh. These are technically freely available through the Quake II CTF demo, but fair warning if you attempt to use these in your project.