This papercraft is Hunter Knife, a melee weapon used by Hunters, based on the online persistent world first-person shooter video game Destiny, the paper model is created by ZombieGrimm. The finished model measures about 10 inches long.
Melee attacks by Hunters using this weapon take the form of an upward slashing motion that causes a large amount of damage. Additionally, the Super Ability Arc Blade encases it in electric blue energy, dealing heavy damage.
The Hunter Knife is "rugged, utilitarian, and quiet", enabling silent kills for Hunters. Although it has been implied that the Hunter Knife is used exclusively by Hunters, Destiny screenshots have also shown Warlocks using a knife that appears very similar. [Source: wikia]