What appears to be the Glock 17 is carried by police officers, notably in "Live Free or Die" (S5E01). In "Madrigal" (S5E02), Chris (one of Mike's former men) uses one with a suppressor to kill Duane Chow.
DEA Agent Hank Schrader (Dean Norris) continues to carry a Glock 22 as his sidearm in the series. He is notably seen drawing his weapon in "To'hajiilee" (S5E13).
In "Madrigal" (S5E02), Mike uses a suppressed Beretta Cheetah to kill his former man Chris, at the conclusion of the episode he is seen checking it and later threatening the paranoid Madrigal executive Lydia with it.
In "Live Free or Die" (S5E01), Mike pulls a Beretta 92FS Inox on Walt. In "Buyout" (S5E06), Jesse & Mike pick up Beretta 92FS Inox pistols from dead men and use them when escaping Don Eladio's compound, Jesse empties his into a cartel member who wounds Mike.
A Colt Woodsman is one of the weapons that Mike disposes of by throwing it into a well in "Say My Name" (S5E07). Although only the front portion of the pistol is seen so it is not possible to positively identified the specific model, the 4.5" barrel, high ramped front sight and the shape o the triger guard suggest it is likely a 2nd series "Sport".
In "Say My Name" (S5E07), Mike keeps a bag full of money as well as a Smith & Wesson Model 625 in a holster. Walter is later seen holding the revolver in the episode.
Walter White (Bryan Cranston) is seen retrieving an M60 machine gun, with an instruction manual and several boxes of ammunition, from the trunk of a car after purchasing it in "Live Free or Die" (S5E01). The machine gun is later seen in the series finale "Felina" (S5E16).
