Had a look at Benelli's special drone defense version of their M4 shotgun last week. Not much different on the outside, well except for the special logo on the receiver, but they claim that their new longer forcing cone in the barrel combined with a special modified choke make this gun particularly effective against smaller (and obviously visible) drones on the battlefield. They in fact claim effectiveness out to 100m thanks to their new Advanced Impact system, which is that forcing cone again, larger and longer than in previous models. I did not think to get their recommendation for the ideal shot size to be used but since they say the gun will double as a antipersonnel weapon, they must be considering buck size shot will be deployed. Anyway, these are certainly reflecting a new era in ground warfare that has grown out of the situation in Ukraine. Check out their description of the new AI system at the bottom of the linked page.

The M4 A.I. Drone Guardian 18,5″ combat-proven shotgun offers unmatched reliability in all terrains and weather conditions. Its primary purpose is to serve as a “last resort” weapon against small quadcopter FPV drones on the battlefield or to quickly neutralize spy drones. It can be deployed by a squad or firing team, and functions as a personal defense weapon (PDW) for individual operators in real combat situations. With the M4 A.I. Drone Guardian, we can achieve this objective.
Featuring a patented system with a larger and longer cone inside the barrel, this shotgun enhances the ability to hit targets at greater distances compared to standard shotguns, providing deeper penetration and destructive capacity. It is effective for engaging targets from 0 to 50 meters (optimal range) and can reach up to 100 meters or more (borderline shots).
https://www.benellidefense.com/product/m4-a-i-drone-guardian-185/

The M4 A.I. Drone Guardian 18,5″ combat-proven shotgun offers unmatched reliability in all terrains and weather conditions. Its primary purpose is to serve as a “last resort” weapon against small quadcopter FPV drones on the battlefield or to quickly neutralize spy drones. It can be deployed by a squad or firing team, and functions as a personal defense weapon (PDW) for individual operators in real combat situations. With the M4 A.I. Drone Guardian, we can achieve this objective.
Featuring a patented system with a larger and longer cone inside the barrel, this shotgun enhances the ability to hit targets at greater distances compared to standard shotguns, providing deeper penetration and destructive capacity. It is effective for engaging targets from 0 to 50 meters (optimal range) and can reach up to 100 meters or more (borderline shots).
https://www.benellidefense.com/product/m4-a-i-drone-guardian-185/