Armor Girls Project is a brand of figurines of mechanized girls by Bandai with licenses to several mecha and mecha musume franchises, including Kantai Collection.
In practise, this tag is mostly used for their version of Haruna Kai2 which features mechanical hands in guise of the armor plating on her rigging. They also have a version of Kongou Kai2 who can interlock her armor plating to form a shield.