Glock 18

The Glock 18 was first seen in episode 4, and then became more well known as "James' Gun." James' Glock 18 is the first one to appear in the series, and in the early seasons, became an object to theaten Jim with, and even shot him a few times.

The Glock 18 is the default gun for most uses and/or characters.

Trivia

 * James' Gun is so far the only Glock 18 to have appeared.