What’s the background of Robinson that gave him the ability to make that shot at that distance?
LEO family with a hunting background, and looks like a lot of photos of playing around with guns at the range too. Pretty plausible given the distance not being too crazy, for someone with background and familiarity with firearms.
Army trains most everyone to plausibly make such a shot without a scope in 2-3 weeks.
“you must hit at least 23 out of 40 pop-up targets at ranges varying from 5 meters to 300 meters (approximately 80 to 327 yards)”
With scope, much, much easier.