I suggest a radar:
Radar wave: Fastest speed possible for projectile (not raycast/instant), that once hits a target, changes direction 180 degrees, or automatically homes to the gun/shooting brick
and then it triggers onRadarWaveHit
and a radar gun, that would shoot a radar wave that once it hits a target it returns to the gun (unless it gets seriously deflected)
and then it would display range from target, maybe other things like if its an enemy/friendly player,vehicle,brick
and a radar vehicle, that can be automated with bots to find targets
