Presenting the Short Bow Carbine, by Grand Capital Arms! Designed for use in close quarters and normally assigned to engineers or tank/mecha crews.
It has a pair of electronically fired mini rocket launchers instead of a grenade launcher, and a special optics package to help detect badguys and 'pre-aim' the rockets. The buttons can select which rockets are to be used and the central button fires a single rocket.
I added the initial thumbnail side view silhouettes and some notes on my design process at the bottom.
This is part of my submission for Hum3D's 'Three D Guns Challenge Part 2'.
https://hum3d.com/3d-guns-challenge/#rules