(Answered) ProtoMech ACs and Armor-Piercing Ammo

[Kojak]

Since the table on page 11 of the RS 3145 NTNU PDF indicates that ProtoMech ACs can use armor-piercing ammo now, how do the mods for the Determining Critical Hits table (i.e. -1 for AC/20s, -4 for AC/2s) map onto the ProtoMech AC sizes (2, 4 and 8)?

[Xotl]

-4 for PAC 2, -3 for PAC 4, and -2 for PAC 8.