Does the SMG sound like any of the existing weapons? Maybe I can use another sound as a reference point.
We are mixing two things here. Let me clarify this out:
1) the current SMG sound is pretty ok. You can search that file in your base/sound/weapons directory, the file name is smg.wav
2) we need the sound for Machine Pistol, which smaller, less-capable version of SMG; so I could imagine that the sound could be similar, yet still different.
For the grenage, we're talking about the frag grenade right?
As a start. I wouldn't mind having different sounds for different grenades. But yes, as a start we definitely need new sound for frag grenade.
I'm thinking a deep sub-woofer thwomp with a sonic crack and perhaps a fiery frizzle to boot.
The sound should give the feeling of an explosion. Current sound is the file frag_grenade.wav and as mattn wrote, it is somehow too much "breaking glass"-like. We also have different sound for smoke grenade (the file smoke_grenade.wav) which is quite good. If you mean something like that for frag grenade, then no, please do it more "explosive".
Mattn already wrote he commited your bolter sound to repo. Send me a privmsg here your name and surname to add it to CONTRIBUTORS file unless you do not want to be there with your nick. Thanks for your work!