The following weapons were used in the film Line of Duty:
Handguns
Glock 17
The Glock 17 is used by Frank Penny (Aaron Eckhart), as well as by other police officers.
M1911 Series Pistol
The M1911 Variant is used by Max Keller(James Hutchison III).
Submachine Guns
Heckler & Koch MP5A2
Frank Penny (Aaron Eckhart) is seen wielding a Heckler & Koch MP5A2 fitted with a reflex sight and a weaponlight.
Rifles/Carbines
Bushmaster HBAR Carbine
What appear to be Bushmaster HBAR Carbines, given the barrel profile, are carried by SWAT officers.
BCM CQB-11 KMR-A10
What appears to be a BCM CQB-11 KMR-A10 is used by a police officer.
TTI BCM Recce-14 KMR-A13
Another police officer uses a Taran Tactical Innovations BCM Recce-14 KMR-A13 with an ACOG scope and a vertical grip. Dean Keller (Ben McKenzie) takes it uses it.
TTI BCM TR-1 SBR
Dean Keller (Ben McKenzie) also uses a Taran Tactical Innovations BCM TR-1 SBR with an ACOG scope, offset RMR, SureFire X300 Ultra weaponlight, and Magpul PMAGs.
Shotguns
Remington 870 Police
Frank Penny (Aaron Eckhart) uses a Remington 870 Police shotgun with rifle sights and a Surefire dedicated forend weaponlight.