Of course “something is wrong”.
A retired, 64yr old accountant with no military training and very little, if any, experience with guns was able to accomplish the following:
From a downward angle of 30deg and a range of 500 yards...in the dark...keep a fully automatic rifle in the “kill box” size of about 1 acre. And deliver at least 500 rounds into that box in 10 mins.
That’s professional grade shooting.
And this guy was a 64yr old retired accountant and drunken gambler.
On it’s face it does not appear plausible.
Barbara Streisand. The “30deg downward angle” would actually be beneficial to the trajectory of the bullets. And all he had to do was keep the site on the big, shiny, bright lights of a big concert venue and let the bullets land where they may. If you put 1000 balloons in a small area and shot from 1,000 feet away, you’d still hit something. And I doubt he had a fully automatic weapon, at most he might have had a bump stock. Either way, he didn’t need to have a full auto rifle. I can empty a 30 round mag pretty damn quick just squeezing the trigger one at a time.