MRA4 does not have inerting system in the probe, but even though AAR will not be necessary the probe remains pressurised with fuel. As for flight deck armour, I concede my info might be out of date for MR2, however, I am sure MRA4 does not have fda.
Apologies for any inaccuracy. It is important that my statement is correct so please PM. I don't want the messenger shot, I want 100% accurate info to be posted here, for obvious reasons.