A woman robbing a convenience store in "Do You Love An Apple" (S3E01) is seen armed with a Glock 17. Lewis and Clark County Deputies including Deputy Poppernack (J. Anthony Pena) are also seen using Glock 17s as their service weapons.
A woman is seen using a Glock 17 to hold Jef hostage in "Woods are Lovely, Dark and Deep" (S3E02).
Glock 19
Jenny Hoyt (Katheryn Winnick) continues to carry a Glock 19 as her sidearm in Season 3. Like the previous season, it switches from Gen 2 to Gen 3 at its discretion.
Colt M1911A1
Sheriff Beau Arlen (Jensen Ackles) continues to carry a parkerized Colt M1911A1 as his sidearm this season.
Davis P-380
Jenny Hoyt finds a Davis P-380 in a bag belonging to Jef in "Woods are Lovely, Dark and Deep" (S3E02). It's identified as a .380 by Donno.
Kahr K9
Jenny Hoyt (Katheryn Winnick) is seen surrendering a stainless Kahr K9 to a security guard during undercover work in "A Brief History of Crime" (S3E03).