The XM2 Reginleif is an experimental third-generation Feldreß of the Federal Republic of Giad. It was designed by Lieutenant Colonel Grethe Wenzel and is reverse-engineered from the Republic of San Magnolia's M1A4 Juggernaut. It is built for high-mobility attacks as part of a mobile defense strategy.
A four-legged machine very similar in appearance to the M1A4, the XM2 has a similar crew position, though it also features an auxiliary seat for a single passenger. The two mechs also are used in similar tactical roles since both are used for hit-and-run tactics to maximize their high mobility compared to other slower Feldreß like the M4A3 Vanagandr. The armament and armor of the XM2 and M1A4 are very different though.
The XM2 usually packs a high-velocity 88mm smoothbore cannon that can fire both high-explosive anti-tank shells or fin-stabilized sabot penetrators. However, the cannon can be switched out for a multiple-rocket launcher pad, as used by Anju, or an autocannon like that mounted on Raiden's Wehrwolf. The 88mm cannon itself can also be modified to the user's preferences. Kurena's unit has an extended barrel to improve accuracy and shell velocity.
The secondary armaments of the XM2 include the pair of arm mounts and wire anchors found on the M1A4, with the arm mounts being able to equip either high-frequency blades for close combat or 12.7mm heavy machine guns. The XM2 also had four pile drivers added, one on each leg. The pile drivers are used for close combat to pierce the armor of the Legion and can each be used twenty times. In combat, the pile drivers sometimes become stuck to the Legion and have to be purged.
The XM2 is visibly more armored than the M1A4. Compared to the M1A4's complete lack of safety features for the Processor, the XM2 has significant armor increases that allow it to withstand the machine gun fire of the Ameise. While the Legion has changed the Ameise armament to a 14mm heavy machine gun in order to defeat the armor of the XM2, the improved armor is nonetheless a great improvement in defense against shrapnel. The XM2 is also noted to have greater speed and maneuverability compared to the M1A4 in spite of the increased weight from the larger gun and thicker armor, implying that the XM2's propulsion systems have been upgraded.