Detective Hieronymus "Harry" Bosch (Titus Welliver) continues to carry a Kimber Custom TLE II as his service weapon. The Kimber is the pistol author Michael Connelly specifies as Bosch's LAPD sidearm in his later novels.
Bosch's partner, Detective Jerry "J. Edgar" Edgar (Jamie Hector) carries the Glock 17 as his service weapon. Other LAPD officers also armed with the Glock include Chief Irvin Irving (Lance Reddick), Det. Rondell Pierce (DaJuan Johnson), and Det. Christina Vega (Jacqueline Obradors). (The Glock 22 was previously the official department issue of the LAPD). The Glock fitted with a suppressor is used by several criminals, including Dalton Walsh (Chris Vance).
The Beretta 92FS, which was previously the department-issued service weapon of the LAPD, is seen carried by several veteran officers, including Det. Jimmy Robertson (Paul Calderon) and Lt. Grace Billets (Amy Aquino).
What appears to be a Heckler & Koch VP9 is the primary weapon used by "Sheriff" (Ryan Dorsey) and Stones (Billy Lush). A similar pistol is held by Bosch following a fight on the plane in "Salvation Mountain" (S5E08).
A SIG-Sauer P226 is wielded by Vardy (Chris Ashworth) in "Wisdom of the Desert" (S5E07). He uses it with a suppressor in "Creep Signed His Kill" (S5E10).
While undercover, Bosch keeps a Smith & Wesson Model 60 in his backpack. Dalton Walsh (Chris Vance) confiscates this revolver and uses it to threaten Bosch in "Two Kinds of Truth" (S5E01).
A Remington 870 is the standard shotgun used by LAPD officers in the series. Some of these shotguns are fitted with a Surefire dedicated forend weaponlight. Remington Model 870 shotguns used for less-lethal operations are used by the LAPD.