I and the several people we think that the sound of XM8 sounds like pebbles on the tin so I searched a bit and found this one, which is taken by real XM8 fire.
If someone want to replace the current XM8 sound with this one, please do the following: download\extract and replace the .wav file located in the:
Main Game Folder\media\packages\vanilla\sounds
NOTE
please do not forget to backup the original .wav file before replacement

To the devs - l do not know where it was taken the current sound of XM8, but if you think that the suggested of me is more surefire than the current one, you could replace it in the next version.

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"Ad cogitandum et agendum homo natus es"

I work quickly, cheaply and qualitatively. You can choose only two of the three options.

we can't add sounds that are not free. Unless you got it from a source that claims that it's free for commercial use. In this case I'd need the exact source.

Sry, I forgot to point out where I took the sound, because I didn't even thought that there might be any claims for copyright, since the video has been uploaded under Standard YouTube License, even more I used only a sound lasting less than a second.
Anyway here is the source: https://www.youtube.com/results?search_ ... ault+Rifle - I got the sound from the second clip(XM8 rifle by Wilhelm Ax)

_________________
"Ad cogitandum et agendum homo natus es"

I work quickly, cheaply and qualitatively. You can choose only two of the three options.