A two-tone Beretta 92FS was used by a thug in "Bears will be Bears" after being attacked by Eddy in his Bludbad form.
Beretta 92G Elite IA
A Beretta 92G Elite IA is used by Roland Blake (Shawn Law) in "Let Your Hair Down". This has a torchlight attached.
Glock 17
Detectives Nick Burkhardt (Dave Giuntoli) and Hank Griffin (Russel Hornsby), as well as Captain Sean Renard (Sasha Roiz) are armed with 2nd Generation Glock 17s as their standard sidearm, although a 3rd generation Glock 17 later appears in the middle of the 1st season. This is correct since the Portland Police Bureau standardized the Glock 17 as one of the sidearms allowed for use by all of their officers. An Oregon Park officer has a Glock 17 in "Let Your Hair Down". Soledad Marquesa (Jordi Caballaro) has one in "Three Coins in a Fuchsbau". Nick had switched his Glock 17 from a second to a third generation type starting from "Happily Ever Aftermath". Juliette Silverton (Bitsie Tulloch) fires a Glock 17 at a shooting range in "Island of Dreams".
Heckler & Koch HK P30
A Heckler & Koch P30 was used by Thomas Woolsey in "Love Sick" before Renard disarmed him and used it to kill him and his cousin, Anton Krug.
Heckler & Koch P7M13
Both black and stainless Heckler & Koch P7M13s was used by Soledad as his main sidearm prior to switching to a Glock 17 in "Three Coins in a Fuchsbau".
A silenced Luger P08 is used by Verrat assassin and enforcer Edgar Waltz (Sebastian Roché) in "Cat and Mouse". Ian Harmon (Neil Hopkins) uses Edgar's suppressed P08 in the same episode.
A Taurus PT945 with a mounted silencer is seemingly used by Lt. Peter Orson (Daniel Roebuck) in "The Three Bad Wolves" in assassinating Hap. He later tries to use it against Angelina before Nick disarms him.
Walther PPK
A Walther PPK with a mounted suppressor is used by an assassin and Ian Harmon in "Cat and Mouse". One is seen on the floor of a crime scene at the start of "Game Ogre".
Walther P99
A Walther P99 is seen on a sign at a shooting range in "Island of Dreams".
Gilda Darner (Amy Gumenick) arms herself with a Smith & Wesson Model 19 revolver in "Bears will be Bears" after getting bail, taken from Rocky Babb's room.
Smith & Wesson Model 65
A Smith & Wesson Model 65 with a 3" barrel is used by Bernard Aidikkoff to kill himself before police can arrest him in "Happily Ever Aftermath".
An IMI Micro Uzi is loaded on a duffel bag in "Three Coins in a Fuchsbau".
Ingram MAC-11
Joshua Hall (Sean Cook) uses a MAC-11 as his main weapon in "Island of Dreams".
Rifles
Colt M4A1
A DEA officer in "Let Your Hair Down" walks by with a Colt M4A1. Portland Police Special Emergency Response Team (SERT) officers are armed with the M4A1 in "Game Ogre" when they raid the apartment of a suspect.
Ruger M77 Gunsite
A Ruger M77 Gunsite is seen in the interior of a pickup in "Let Your Hair Down". It's used by Roland Blake (Shawn Law) as his main weapon.
Steyr Scout
A Steyr Scout in the interior of a pickup in "Let Your Hair Down". It's used by Micah Blake (Matthew DiBiasio) as his main weapon.
Elephant Gun
Monroe (Silas Weir Mitchell) is armed with a triple barrel-based Elephant Gun in "Game Ogre" in order to defeat the ogre before he could kill Hank.
Shotguns
Mossberg 500
A Mossberg 500 with black plastic furniture was used by Orson when he confronted Monroe in his house in "The Three Bad Wolves". A Mossberg 500 with 8-shot magazine is used by Hank near the end of "Game Ogre". Captain Sean Renard uses one in "Organ Grinder" when he leads a Portland Police squad to secure a crime scene.
Mossberg 590 Folding Stock
A Mossberg 590 with an ATI folding stock and shotshell holder was used by Hank to guard his house in "Woman in Black".
Remington 870
A few Portland Police Bureau officers are seen armed with Remington 870s in "Let Your Hair Down".
Remington 870 MCS
A Remington 870 MCS is apparently used by Delmar Blake (Drew Barrios) at the start of "Let Your Hair Down".
Remington 870 with Pistol Grip
A sawed off Remington 870 with pistol grip is seen in "Three Coins in a Fuchsbau".
Others
Doppelarmbrust
Used by Nick and wielded by Monroe briefly in "Leave it to the Beavers". Nick uses it again in "Woman in Black". Akira Kimura tries to grab one before being disarmed in the same episode.