zero_point_energy_field_manipulator physgun
Fictional tool from Half-Life 2 introduced to assist the player with physics-based puzzles and for hurling objects at enemies (Or punting smaller enemies). An enhanced version is occasionally granted, increasing the range and force, and allowing the player to punt and even pick up larger enemies.
Composed of what seems to be a Xen crystal and a cobbled together handle, trigger, and claw. The crystal turns light blue when enhanced.
The physgun from Garry's Mod uses the same model as the enhanced version.