The Heckler & Koch Mark 23 is a weapon designed after a request of the United States Special Operations Command, as an offensive handgun for the Special Forces. The gun is part of a larger weapon system that includes an attachable Laser Aiming Module (LAM), a suppressor, and some other features such as a .45 ACP +P ammunition rating and a match trigger.
The HK Mark 23 is Rick's main firearm throughout the comic series and is assumed to be his duty pistol. Unlike his comic counterpart, Rick in the TV series only makes use of the HK Mark 23 twice in the fifth season of the show. Although many may just think Rick uses a 1911 or a generic pistol in the comics, it can clearly be recognized by the markings on the barrel in Volume 1: Days Gone Bye.
|"Issue 4"||Rick is seen using his HK during the gun store raid. Note the markings on the barrel, the words "HK Mark 23" can clearly be seen.|
|"Issue 4"||Rick uses his HK to fight a group of zombies attacking the Atlanta Camp.|
|"Four Walls and a Roof"||Rick holding his Heckler & Koch Mark 23 on Gareth.|
|"Four Walls and a Roof"||Rick aiming his Heckler & Koch Mark 23 at Gareth.|
|"Crossed"||Rick firing his Mark 23 at the police officers.|
|"Crossed"||Rick aiming his Mark 23.|
|"Crossed"||Rick holding his Mark 23.|
|"Crossed"||Rick aiming his Mark 23 at Licari.|