The FA-78-3 Full Armor 7th Gundam is a mobile suit introduced in M-MSV. It was later redesigned and appears in the video game Mobile Suit Gundam: Battlefield Record U.C. 0081.

The FA-78-3 Full Armor 7th Gundam is the additional armor-equipped version of the RX-78-7 7th Gundam. Unlike the previous FA-78-1 Full Armor Gundam, the Full Armor 7th Gundam is able to fight without any drop in performance. This is accomplished with the addition of built-in sub-generators and propellant tanks in the Full Armor components. The emphasis of the Full Armor components is offensive power rather than defensive power. In addition, the tail stabilizer on the rear waist, which is the mass center of the MS, act as an AMBAC device and dramatically improved the unit's acceleration capability.