The CR-LRJ84M is a leg part that appeared in Armored Core: Nexus and later in both Armored Core: Nine Breaker and Armored Core: Last Raven
Lightweight reverse-joint design stressing maneuverability.
This part can unlocked during the mission, Defend Receiving Base. To unlock the part, complete the mission without any allied structures being destroyed.
This leg part appears almost identical to the CLB-SOLID leg part from Armored Core 3 and Silent Line: Armored Core.