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Sheriff Arnold Pope (Terrence Howard) can be seen with a holstered Glock 19 in "Our Town, Our Law" (S01E03).
Glock 17
In "One of Our Senior Realtors Has Chosen to Retire" (S01E04), Ethan Burke (Matt Dillon) is seen taking a Glock 17 from the gun cabinet.
Beretta 92FS
In "One of Our Senior Realtors Has Chosen to Retire" (S01E04), Ethan Burke (Matt Dillon) is searching through the gun cabinet in the Sheriffs office a Beretta 92FS can be seen. Ethan is also seen pulling one when startled by an 'Abbie' in "The Truth" (S01E05).
Walther P99AS (Anti Stress)
In "One of Our Senior Realtors Has Chosen to Retire" (S01E04), Ethan Burke (Matt Dillon) is searching through the gun cabinet in the Sheriffs office a Walther P99AS (Anti Stress) can be seen.
Revolvers
Smith & Wesson Model 66
Sheriff Arnold Pope (Terrence Howard) can be seen with, a Smith & Wesson Model 66 in a crossdraw holster in "Don't Discuss Your Life Before" (S01E02), and is seen drawing it in "Our Town, Our Law" (S01E03), Ethan Burke (Matt Dillon) is also seen retrieving this revolver.
Shotguns
Mossberg 500
In "Don't Discuss Your Life Before" (S01E02) Sheriff Arnold Pope (Terrence Howard) is seen holding, what appears to be, a Mossberg 500 on Secret Service Agent Ethan Burke (Matt Dillon) on 2 separate occasions. Ethan Burke is seen taking this shotgun from the gun rack in the Sheriffs station in "One of Our Senior Realtors Has Chosen to Retire" (S01E04), which he is then seen using during the opening of "The Truth" (S01E05) to defend himself from an 'Abbie'.
Assault Rifles
M4A1
While climbing a tree in "Don't Discuss Your Life Before" (S01E02), Ethan sees a man who appears to be hunting with an M4A1. A guard is also seen pulling one on Ethan Burke in "The Truth" (S01E05).