The Sand Flea would be able to monitor an area for far longer and is much quieter than a quadcopter. Also, the Sand Flea can enter buildings/caves, and likely

The Sand Flea would be able to monitor an area for far longer and is much quieter than a quadcopter. Also, the Sand Flea can enter buildings/caves, and likely carry a small munition load. The REF doesn't invest in things that aren't ready to go to the sandbox. I think this is far further along than mid-stage.