This is a posable action figure from the Nendoroid series.
Adapted from the Good Smile Company website:
A new Iron Man Nendoroid has appeared -- this time, it's the Mark 85 from "Avengers: Endgame!" It features full articulation and metallic paintwork and partition lines of the figure match the real suit suit, ensuring he looks great no matter how you pose him. Both masked and unmasked head parts are included. Using the included Repulsor effect parts, you can easily recreate action scenes from the film.
This DX version includes the Nano Light Refocuser as well as a miniature-sized figure of Rescue, allowing you to recreate a wide variety of battle scenes. An interchangeable arm part equipped with the Infinity Stones is included in order to recreate the scene from the end of the film.
A special stand base based on the final battle from the film is also included, and can be displayed side-by-side with the based included with Nendoroid Captain America: Endgame Edition DX Ver. (sold separately). Be sure to add him to your collection!