Personally, I like the old STG44 sound a whole lot more than the current one. It sounded much more like a real gun imo:
http://www.youtube.com/watch?v=jSQL3xa4m0U
Here is a video of a real STG44 so you can compare:
http://www.youtube.com/watch?v=0WOzqKRy0oM
If the current one is more accurate to the real sound forget what I said, but as far as I know the mod sound was quite accurate to the sound in that second video.
http://www.youtube.com/watch?v=jSQL3xa4m0U
Here is a video of a real STG44 so you can compare:
http://www.youtube.com/watch?v=0WOzqKRy0oM
If the current one is more accurate to the real sound forget what I said, but as far as I know the mod sound was quite accurate to the sound in that second video.