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What appears to be a Flintlock pistol is near at the armory of Aunt Marie's trailer in the middle of "Cold Blooded".
Glock 17
The Glock 17 returns in the season as the standard sidearm of all police officers in the Portland Police Bureau. A couple of Verrat assassins disguised as Austrian Federal Police officers are armed with a Glock 17 before being gunned down in "Twelve Days of Krampus".
Kimber Custom TLE II
What appears to be a Kimber Custom TLE II is used by Tavitian (Bernhard Forcher) in "Twelve Days of Krampus" to take out Verrat assassins in the rural parts of Austria while en route to a resistance meeting.
M1911A1
A serial robber uses what appears to be a M1911A1 at the beginning of "El Cucuy".
SIG-Sauer P226
Another serial robber uses a nickel SIG-Sauer P226 at the beginning of "El Cucuy".
Walther P99
The Walther P99 is seen in the season's opening sequence.
Revolvers
Smith & Wesson 686
A Smith & Wesson 686 with a 4" barrel is seen used by an armed man trying to defend his family from a crazed zombie-like Nick at the beginning of "PTZD".
Submachine Guns
Heckler & Koch MP5SD3
A Verrat assassin tries to use a Heckler & Koch MP5SD3 in "Twelve Days of Krampus", but is never fired.
Heckler & Koch MP5SD6
Heckler & Koch MP5SD6s are used by Verrat assassins sent to kill Renard and Meisner (Damien Puckler) in their Vienna hideout in "Stories We Tell Our Young". These have picatinny railings on to accommodate the installation of red dot scopes. They are later seen in other episodes that are based in Austria.
Heckler & Koch MP7A1
A few anti-Royal Resistance fighters are armed with Heckler & Koch MP7A1s, which first appeared in "Cold Blooded".
KRISS Vector
An anti-Royal Resistance fighter guarding a safehouse in Austria is armed with a KRISS Vector submachine gun in "Twelve Days of Krampus".
Steyr TMP
An anti-Royal Resistance fighter is armed with a Steyr TMP seen in the middle of "Twelve Days of Krampus".
Shotguns
Elephant Gun
Monroe (Silas Weir Mitchell) is armed with a double barrel-based Elephant Gun as seen in the opening sequence in the season.
Remington 870
A Remington 870 with wooden furniture was used briefly by Hank in "Cold Blooded" when he assists Nick in hunting down the Gelumcaeduses responsible for a string of robberies and a couple of murders.
Winchester 1897
A Winchester 1897 shotgun was used by an unnamed bartender (Jim Lykins) before the zombie-like Nick snatches it from him in "The Ungrateful Dead".
Others
Doppelarmbrust
The Doppelarmbrust is seen once again in the opening sequence of the show.