My major point was 1/2 MOA at 1000 yards. I don't believe there is a rifle in existence that is that accurate. Certainly not a semi. I have a 20" LWRC R.E.P.R.that can't pull that off. The man was full of s--t. A f---ing bolt gun will not group that well. 1/2 MOA at 100 yards is damn fine accuracy.
MOA is roughly 1 inch at 100 yards. A MOA increases at 200 yards to 2 inches. 1 MOA at 100 yards is 1 inch groups, 1 MOA at a 1000 yards is 10 inch groups. So, 1/2 MOA at 1000 yards would be 5 inch groups which is very possible.