Viking Heavy Armor Battle Claws 
These are sold in sets of 5, compatible with Gravis and other heavy armor sized marines.
These 3d printed resin models are part of the Greytide Studios Primal Hounds bits collection. These models are perfect for customizing and kitbashing your space marines, battle brothers, and other sci-fi miniature soldiers. Turn those boring plastic models into the Space Wolf or Viking warriors you envisioned.