Monster Manual, page 19
Antimagic Susceptibility. The armor is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the armor must succeed on a Constitution saving throw against the caster's spell save DC or fall unconscious for 1 minute. False Appearance. While the armor remains motionless, it is indistinguishable from a normal suit of armor.
Multiattack. The armor makes two melee attacks. Slam. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) bludgeoning damage.