A decent replacement for the standard MP5. In the archive you'll find updated sounds and all the models (the one in players' hands, the first-person one and the one lying on the ground).
Author: (Dark-Moon) Pein and StoKe
Installation:
Copy the contents of the archive into the valve folder of your game and agree to replace the files. If there's a valve_russian folder besides valve, copy them there too.
Read more here on how to install Half-Life models
Download: