Lightweight core model with weapon storage capability.
- Armored Core: Nexus: This part can be unlocked during the mission Destroy Resistance Group. To unlock the part, complete the mission.
- Armored Core: Last Raven this is in the shop from the very beginning.
- The CRONUS is one of the parts unlocked to recreate Stinger's AC, Vixen. However, its chest cannon has been omitted and replaced with a hanger functionality.
- In the TGS build, the part originally went by the model number of MCL-MX00R.