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The following weapons were used in the television series Vegas (2012):
A suppressed Beretta M1934 was used by Rizzo Mob Liuetenant Anthony "Red" Cervelli (James Russo) in "(Ill)Legitimate" (S1E04).
Browning Hi-Power
A home invasion robber uses a nickel plated Hi-Power in "All That Glitter" (S1E03). Assassins working for the Milwaukee Mob fire Hi-Powers at Savino at a parking garage in "(Ill)Legitimate" (S1E04). Jones (Damon Herriman), a mob enforcer for the Milwaukee Mob, is armed with a nickel plated Browning Hi-Power in "Solid Citizens" (S1E05).
Colt Model 1903
A suppressed Colt Model 1903 is used by Rizzo Mob enforcer Vic Borelli (Joe Sabatino) in in "(Ill)Legitimate" (S1E04).
Revolvers
Colt Detective Special (3rd Gen)
A 3rd Generation Colt Detective Special is seen in the possession of a murder suspect in "Pilot". Sheriff Ralph Lamb (Dennis Quaid) is later seen with the revolver, the presence of a 3rd Generation Detective Special is an anachronism due to the fact that the show takes place in 1960 and the 3rd Gen DS came out in 1972.
Smith & Wesson Model 10
A Smith & Wesson Model 10 is pulled by the Clark County Sheriff in "Pilot" (S1E01). A Model 10 is found by Ralph during a search in "All That Glitter" (S1E03). It would appear that Sheriff Lamb also uses a Model 10 as his main sideaerm. Ralph cleans the Model 10 in "(Il)Legitimate" and is first used in "Solid Citizens" (S1E05). Clark County Deputy Sheriffs are also armed with the Model 10.
Shotguns
Winchester Model 1912
The Winchester Model 1912 is one of the firearms owned by Ralph Lamb (Dennis Quaid). Don Simmons (Gill Birmingham) uses the 1912 in "Solid Citizens" (S1E05). Dixon uses one in "The Real Thing" (S1E06).
Ithaca 37
The Ithaca 37 shotgun is seen carried by Ralph's son Dixon (Taylor Handley). A jewel store robber uses one with a pistol grip before Ralph and Jack apprehended him in ambush in "Money Plays" (S1E02). The same weapon was also used by a home invasion robber in the same episode.