In episode 4 of this season (Hamsterdam) Bunk talks to a group of kids that Carv and Herc round up about Doserman's missing gun. He says "Glock 9" referring to a 9mm Glock. When he gets the gun back in this episode from Omar via Butchie, Butchie says, "Glock .40 I believe." The gun somehow changes from a Glock 17 or 19 into a Glock 22 or 23. The Baltimore Police Department switched from 9mm to .40 caliber in 2000. Most likely a technical advisor noted the mistaken earlier references to the lost police weapon as a "nine" and they referred to it as a "40" subsequently without explaining the change.
After Snoop commits the drive by the window of a nearby car is shown to be intact but in subsequent shots the window is completely broken.
The first shot of Avon Barksdale's subject arrest information shows that he was released from prison on 8/24/04, but in the second, more zoomed-in shot, his release date is listed as 9/24/04.