drone takedown tools: beam guns and eagles

[Toolmaker51]

Insufficient recoil, certainly isn't a centerfire handgun. Many [most] semi-auto's can't chamber successive rounds without a decent grip or weak wrist. Inertia of slide versus restrained frame assures full ejection of spent case and strips cartridge from magazine.
This armed drone looks to carry a full sized pistol ie 1911, Beretta 92 etc. Whatever pistol, instead of it's standard round 9mm, .45, sure not 10mm or Coonan .357; is I'll bet fitted with a rimfire .22 conversion kit. A full size target .22 would also operate suspended in a drone ie S&W 41, Ruger MK IV etc.
The drone's reaction to recoil shows near perfect straight line evidence of Newton's law. Muzzle rise [handguns] stem from the wrist, effectively an axle or trunnion, below centerline of bore. Countering the effect, Olympic style [free pistol] are peculiarly configured to lower bore centerline with web between thumb and forefinger. The Morini and Hammerli are good examples, but are single shot.
For me, neither S&W 41's or Medalist Browning's in personal collection would be subjected this kind of undignified activity.