Rifles aren’t a desirable drone-interception tool. For one thing, it’s hard to hit a small moving target that may be hundreds of meters up in the air. Overshoot is also a huge problem - unlike birdshot pellets which fall harmlessly to the ground after 300 meters or so, rifle bullets can travel at lethal velocity for several kilometers. Even if you hit the drone, your bullet may keep traveling.

There was a marketing campaign for a jamming gun to essentially disable drones. (I imagine some would just float statically though)