This is a Godkiller gun used in the 2011 Nicolas Cage film Drive Angry 3D. The gun can be seen in the film several times, including the sequence where Piper (Amber Heard) loads the Godkiller before Milton (Nicolas Cage) fires it.

This is a Hero Hardcopy (highly detailed resin version) of the Godkiller gun. The hand grip has demonic carvings to suggest a weapon that has been brought from Hell. Also featured on the handgrip is a group of leather strings with several metal charms attached: a crescent moon, an upside down cross, a dragon, and a star with a demon head in the center. The trigger seems to have broken while on production and repaired on set but still an awesome 20" baby.