A 7.62mm LMG, which for the purposes of this exercise I will regard as a belt fed ACR. 3D, +6 AUTO
No, thats a LMG. 4D6 damage.
A .50 cal MG, which here we will stat as the Mercenary LMG. 4D, +6 AUTO.
No, thats more like a 6D6 machinegun (~same ammo as the LAG).
Skill 1, no other factors...