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The following weapons were used in Season 3 of the television series Chicago P.D.:
The Glock 17 is the sidearm carried by the majority of the detectives in the Special Intelligence Unit of the Chicago PD including Antonio Dawson (Jon Seda), Detective Jay Halstead (Jesse Lee Soffer), and Alvin Olinsky (Elias Koteas). The Glock is also carried by the majority of the patrol officers on the show, including Officer Adam Ruzek (Patrick John Flueger) and Officer Kim Burgess (Marina Squerciati).
A Remington 870 shotgun fitted with a pistol grip, breaching muzzle, and saddle shell holder is used by Alvin Olinsky (Elias Koteas) in "Life is Fluid" (S3E01).
Other
Weapons Room
In "Climbing Into Bed" (S3E05), the unit discovers a storage room filled with numerous weapons.