Sirji totally agree on that, except Marksman rifle.
Marksman rifle needs 1-2 MOA, if I remember correctly then Dragunov has 1.2 MOA.
In some instances, we have used modified INSAS as DMRs. What stops us in doing same MODs to 7.62*51 rifles.
I'd add MMGs to what @tharun had said.
If 7.62*51...