The MSZ-006A1 Ζeta Plus A1 (Z Plus A1) is a part of the MSZ-006+ Zeta Plus line of mass-production mobile suits. The A1 type was the first mass-produced successor to the MSZ-006 Zeta Gundam. It was featured in the photo-novel Gundam Sentinel. The unit is piloted by Amuro Ray.

Technology & Combat Characteristics
The transformable mobile suit MSZ-006 Zeta Gundam developed by the AEUG resistance group is originally considered far too complex and expensive for mass production. But Karaba, the organization that serves as the AEUG's terrestrial forces, takes note of the Zeta Gundam's effectiveness and redesigns it to create the mass production type MSK-006 Zeta Plus (later redesignated as the MSZ-006A1). Because this machine is intended exclusively for use in the atmosphere, its space flight systems and atmospheric entry features are eliminated. However, its cost-performance ratio and flight capabilities are superior to those of the prototype Zeta Gundam.

Instead of the flying armor used by the original Zeta Gundam, the Zeta Plus is equipped with variable geometry wing binders similar to those of the MSN-00100 Hyaku Shiki. These wing binders improve the flight characteristics of the wave rider form, giving it a cruising range of hundreds of kilometers, and in mobile suit form they can be used for AMBAC maneuvering rather than simply becoming dead weight. The Zeta Plus is also equipped with two beam cannons in the side armor, which are connected directly to its movable frame so that energy supply and fire control can be performed without using the mobile suit's hands.