The Fractional Regulation System is a system seen in Armored Core 4 and later in Armored Core: For Answer. This system takes over the tuning mechanic seen in older games.


An AC control system that relays commands to each of the individual parts of the mech from the IRS. The ability of the FRS to optimize and execute control over separate parts without losing overall control gives FRS the advantage over IRS performance. Furthermore, FRS performance can be enhanced through the addition of specialized external memory chips.

Tuning CategoriesEdit

Armored Core 4Edit

Armored Core: For AnswerEdit

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