Добавил: The DSystem
This is animated! I spent some time making sure this was flawless and I believe it is. Here is a .GIF that shows it's animation:
FYI, the third screenshot is three boxes destroyed, and yes this is the default model.
Important note!: If you extract the folder contained in the archive into your half-life 2\hl2 folder it will replace the crates for all Source games.