Russia's answer to drones
 

I would hate to think what else it could be used for.

https://petapixel.com/2019/04/02/rus...-other-drones/

Discouraging unwelcome visitors?

I like it, but I'm no expert and I'm not convinced. Unless the shotgun is recoilless (knowing what the recoil of a 12 gauge is like), I can see no discernable effect on the flight pattern of the drone. Equally, there is no evident muzzle blast, unless I completely missed it in the video. In my view, either the drone has amazing power/weight/thrust ratios in order to counter the recoil or it's not real.
Happy to be proved wrong as the concept is great, or it's an April fool.

Private company develops a drone that shoots down other drone. As its Russian, then necessary to state Putin must be behind it. Kind of like CIA know what you had for breakfeast today.

Hum!
 

Aeroshlot?

Not terribly sure that it is carry a shotgun, looking at the magazine it looks like one of Mr K's pieces or something similar.

Kid's stuff, developed by some students for fun. In peace times, such toys would not be allowed in populated areas (e.g. to put down suspicious drones near airports). And in military ops, its effectiveness is more than questionable.

It's VEPR-12 semi-auto shotgun (based on the same action as the AK though)