His name is Vanguard.
Marvel Comics describes him as follows:
Vanguard is a mutant with the ability to repel any force which is directed at him. He can construct an invisible force field around his body, which can reflect energy or moving objects. He can focus and magnify his powers through the hammer and
sickle he carries with him by crossing them over each other. The full potential of his powers has not been tested yet. In Soviet Super-Soldiers #1, he displayed the ability to fly by repelling the Earth.