This is the desert eagle from GTA: Vice City - a pretty odd looking one with a brighter texture that can be only seen in cutscenes.

This mod will give you the weird opportunity to use it in San Andreas.
This also contains an enhanced texture version, because... why not? It's up to you which one you think it's the best-looking.

Use Modloader for the easiest installation, or replace it in the .imgs, if you feel like to do.. that.