i think its judge dreds newest fir arm.
you not like. it fire a 5.56mm sabot discarding round with internal tungsten/carbide flechette from lower barrel and 35mm grenade from upper barrel and uses cameras, infrared and laser guidance for aiming. you just point and shoot, fire and forget. it is the wave of the future. computers and video camera and laser and FLIR all built into the system and it can share information with other systems on the field and give same view as warrior to commanding officer at HQ.
Your ichiban magomusuko,
PS as an alternative possibility this could also be the new mark of the Felin/Famas that do similar thing to the PAPOP