Watchmen is the 2019 HBO original series adaptation of the DC Comic books series of the same name. Set 34 years after the events of the comic books, the series find the superheroes known as the Vigilantes trying to live their lives after being outlawed by the government. This series is not a sequel to the 2009 feature film adaptation, but rather is a sequel to the events of the comic book series. Watchmen, premiered on HBO in October of 2019. The executive producer is Lost veteran Damon Lindelof, who wrote/co-wrote several of the series' episodes.
The following weapons were used in the television series Watchmen:
A custom pistol made to fire taser rounds is used by Mister Shadow (Lee Tergesen) in "She Was Killed by Space Junk" (S1E03).
Revolvers
Single Action Army
A Single Action Army is seen holstered with a stage actor in "It's Summer and We're Running Out of Ice" (S1E01). It's also seen mounted on the wall of a diner in "Little Fear of Lightning" (S1E05). In "An Almost Religious Awe" (S1E07), an engraved version is seen on a VHS cover of The Raunchy Pistol.
Smith & Wesson Model 10
A Smith & Wesson Model 10 is seen with masked robbers in "Martial Feats of Comanche Horsemanship" in the show American Hero Story. It's seen with NYPD officers in 1938.
Ruger GP100
The Ruger GP100 is seen throughout "Little Fear of Lightning" (S1E05) with Wade Tillman aka Looking Glass (Tim Blake Nelson).
An Ingram MAC-10 with a suppressor is used by a SK militiaman in a mask to assassinate a masked TPD officer during a traffic violation stop.
Assault Rifles
Colt M16A2
What seems to be a Colt M16A2 is seen on a bond paper-sized poster inside TPD HQ in "Little Fear of Lightning" (S1E05). SK militiamen use them in "A God walks into a Bar" (S1E08).
Colt M4A1
What seems to be a Colt M4A1 with a railed upper receiver is seen on a bond paper-sized poster inside TPD HQ in "Little Fear of Lightning" (S1E05). SK militiamen use them when attempt a raid on the Anbar residence in "A God walks into a Bar" (S1E08).
FN F2000 Tactical
The FN F2000 Tactical is used throughout the show as the TPD's main assault rifle.
Unknown
Battle Rifles
Karabiner 98k
A WW2 era Karabiner 98k is strangely seen both in a WW1 Flashback in the opening of the episode and in the hands of an hologram guide of a WWI-era African-American soldier in "Martial Feats of Comanche Horsemanship" (S1E02).
M1903 Springfield
The M1903 Springfield is seen throughout the show as the main weapon for American soldiers in World War I.
M1 Garand
The M1 Garand is seen with the TPD for use by TPD honor guard officers.
Carbines
M1 Carbine
The M1 Carbine is seen in Vietnam War archive video in "An Almost Religious Awe".
The Jag Arms Scattergun is seen with the TPD as a standard less-than-lethal shotgun in place of actual LTL shotguns with the the pump handle, buttstock and pistol grip changed to yellow furniture to show that they're used for LTL situations.
Mossberg 500AT Cruiser
The Mossberg 500AT Cruiser is seen with Angela in "It's Summer and We're Running Out of Ice" and "Martial Feats of Comanche Horsemanship".
Remington Model 870
The Remington Model 870 is seen with a SK assassin inside Angela's house in "Martial Feats of Comanche Horsemanship" (S1E02). They also use it in "Little Fear of Lightning" (S1E05).
Sawed-off shotgun
The sawed-off shotgun is seen with a SK assassin inside Angela's house in "Martial Feats of Comanche Horsemanship".
Winchester Model 1897
A Winchester Model 1897 is seen with some Ku Klux Klan members when the Black Wall Street Massacre started in 1921 in "It's Summer and We're Running Out of Ice" (S1E01).
Machine Guns
Browning M2HB
The Browning M2HB is seen with the SK in "It's Summer and We're Running Out of Ice" on a pickup to act as an improvised technical.
Others
Bow
A bow is used by Adrian Veidt aka Ozymindas (Jeremy Irons) while he goes on hunt in an undisclosed location in "She Was Killed by Space Junk" (S1E03).