This papercrafts are Nargacuga Helmet and Knife, from the Monster Hunter video game series, the paper models were created by gankutsu-o-taku. Nargacuga is the flagship monster of Monster Hunter Portable 2nd G and Monster Hunter Freedom Unite. It looks vaguely similar to the Tigrex, but fights in a significantly different way. Infamously known for its bladed wings and tail slams.
You can download the papercraft template here: Monster Hunter - Nargacuga Helmet and Knife Free Papercrafts Download