A space-use variant of MBF-M1 M1 Astray, the M1A Astray was developed to protect Ame-no-Mihashira. The main difference from the M1 Astray is that the leg structure of the M1A Astray has been greatly simplified, and although this resulted in its legs being only able to support the mobile suit's own weight, it also increased AMBAC capability by 30%. The M1A Astray's maneuverability is further improved due to enhanced vernier thrusters, as well as the mounting of additional thrusters throughout its body.
The M1A Astray is equipped with additional propellant and coolant tanks to meet its higher fuel consumption. It also has enlarged antennas on its head for better communication capability. The fixed armaments of the M1A Astray are the same as the M1 Astray's, consisting of two head-mounted CIWS and two beam sabers. In addition, it can be equipped with a sniper beam rifle instead of the normal beam rifle used by M1 Astray. Due to its coloring, the M1A Astray is often mistaken for MBF-P03 Gundam Astray Blue Frame.