Sounds like more than two kills a day, every day, for more than 1,000 days. Is that possible? Didn’t he ever go on leave?
"Hey, sir, I know I'm a Bradley Commander, and I'm a senior NCO, maybe even a Platoon Sergeant, but I'd like to chill all that for a bit this deployment and take up sniping."
It doesn't happen.
Also, I was a Bradley crewmember for several years in my enlisted days, and I was in the Infantry for a decade. Who aside from snipers (real ones) and fighter pilots track their kills? When a Bradley destroys a vehicle, the BDA (battle damage assessment) sent up the chain describes the vehicles destroyed and, maybe, a guess as to how many enemy KIA.