The AFV is hit with a TK # of 12 (twice the normal TK #), with the only modifier being +1 for an OT vehicle, and (cumulative, unlike with a regular MOL) a +1 for rear facing. There would also be a Specific Collateral Attack (4 FP) vs any Vulnerable PRC. No units in the hex other than the target AFV and it's PRC are hit. At least that is my understanding.