If you are looking for the gallery, see Mossberg 590 Gallery.
Mossberg 590

The Mossberg 590 is first seen being used by Rick's partner, Shane Walsh (Jon Bernthal) during the shootout with the suspects in the overturned vehicle in Season 1 Episode 1, Days Gone Bye, just before Rick is wounded in the line of duty. The shotgun is fitted with an extended magazine tube, heat-shield, collapsible KNOXX SpecOps NRS stock with pistol grip. It appears again later in Shane's possession at the survivor camp and can notably be seen being used by Shane on the attacking Walkers at the camp in Season 1 Episode 4, Vatos. He also uses (aims) it in Season 1 Episode 5, Wildfire, when he and Rick Grimes patrol the woods. Shane also loses his cool when trapped in the Center for Disease Control Headquarters (CDC) in Season 1 Episode 6, TS-19, and uses it to blow up some computer monitors but later uses it in an attempt to bust the glass to escape the CDC which fails. Once outside, Shane uses the Mossberg to blast down walkers as the group runs to the vehicles. Shane continues to carry the Mossberg 590 in Season 2 and uses it to blast some glass doors to gain entry to a high school in Season 2 Episode 2, Bloodletting, and uses it to neutralize several Walkers as he and Otis (Taylor Vince Pruitt) attempt escape in Season 2 Episode 3, Save the Last One. Glenn (Steven Yeun) uses the Mossberg 590 in Season 2 Episode 13, Beside the Dying Fire, in defense of the farm when it is jeprodized. He fires it mostly from a vehicle which is driven by Maggie Greene (Lauren Cohan).