Presented below are some detailed photos of a rare screen-used midgrade Type II Pistol Phaser from Star Trek: The Original Series. This style of TOS phaser features a powerpack/hand grip characterized by an elongated central groove that extends along the full length of the section, and was seen in such 3rd season episodes as "Plato's Stepchildren" and "The CloudMinders".
Some TOS 3rd Season episode screenshots featuring this style of Pistol Phaser ...