Found something in the model files :P
Interesting to say the least :P
opened \Natural Selection 2\Viewer.exe
Then i messed around by opening \Natural Selection 2\ns2\models\alien\skulk and picking the appropriate model file.
Next i went into \Natural Selection 2\ns2\models\marine\rifle Opened the rifle model.
O wow whats that!
(i'll get some images up later, unless someone else beats me to it)
It's conclusively a grenade launcher attachment for the rifle! The proof is the 9 files in the \Natural Selection 2\ns2\models\marine\rifle folder which have in their name "rifle_grenade_"
What's additionally interesting is the attachment makes use of the rail on the left side of the gun. And their's an additonal rail on the right side... so maybe some other attachment ... flashlight or laser sight (or dual-purpose flashlight-laser unit) will come available?
btw if the devs are reading this 99 rounds please, as is expected for a pulse-rifle!!! forget this 30 rounds stuff lol.
The enemy cannot eat an IP, if you disable its head!