The SIG-Sauer P226 is the standard sidearm of all police officers in the Vancouver Police Department. Liber8 members also use stolen P226s as their main sidearms.
SIG-Sauer P228
Agent Kiera Cameron (Rachel Nichols) carries a SIG-Sauer P228 pistol as her main sidearm, after receiving it from Carlos (who carried it as his backup). Curtis Chen (Terry Chen) also uses a P228 in "Wasting Time" (S01E03).
Beretta 92FS
Beretta 92FS can be seen in "Time's Up" (Episode 6) in the hands of Frank Bolo (Mark Gibbon)
During the shootout with Jasmine Garza (Luvia Petersen) in "A Test of Time" (episode 5) and in "Playtime" at the TEDYNE office (Episode 8), Kiera's SIG-Sauer P228 is replaced in a few shots by a Heckler & Koch USP Compact.
Walther P99
A Walther P99 can be seen in "Playtime" (Episode 8).
Colt Police Positive
Alec Sadler (Erik Knudsen) brandishes a Colt Police Positive revolver when confronting his stepbrother Julian in "Family Time" (Episode 9).
Walther PPK
Walther PPK is Julian Randol's personal weapon. This weapon can be seen in "Family Time" (Episode 9).
A Glock 17 is used by Matthew Kellog (Stephen Lobo) in "A Test of Time" (S01E05). This gun is also used by Jasmine Garza (Luvia Petersen) and Sonya Valentine (Lexa Doig) in several episodes.
Submachine Guns
Heckler & Koch MP5A3
Heckler & Koch MP5A3 submahine guns are widely used by Vancouver Emergency Response Team officers. Travis Verta (Roger R. Cross), Curtis Chen (Terry Chen) and Matthew Kellog (Stephen Lobo) also use MP5A3s in a few episodes after stealing them from a police cruiser.
Shotguns
12 Gauge Double Barreled Shotgun
Remington 870
In "A Stitch In Time" (Episode 1) Liber8 members attacked Vancouver Police Department officers and take their weapons. One of the stolen guns was a Remington 870 with a breacher muzzle device and collapsible stock, which is used by Liber8 member Stefan Jaworski.
Rubber Remington 870
Ithaca 37
Ithaca 37 can be seen in "Family Time" (Episode 9) in the hands of Hoyt (Wesley MacInnes). Carlos tried to take this gun, but is wounded before he can do so.
Mossberg 500
Gates (James Pizzinato) uses a Mossberg 500 in "Family Time" (Episode 9). Kiera captures the Mossberg, but is disarmed by Phil.
Assault Rifles
SIG SG 552
SIG SG 552 can be seen in "Playtime" (Episode 8) in the hands of players in a combat simulation. The SG 552s in this episode appear to be airsoft guns, since the number of rounds in the magazines do not decrease during firing, and the muzzle flashes are added by CG.
Colt Model 715
Liber8 member Jasmine Garza (Luvia Petersen) uses a Colt Model 715 rifle fitted with a Cobray 37mm Launcher in episode 2. This may also be an Olympic Arms K4B, which is very commonly seen in productions filmed in Vancouver.
Colt M4A1
Carlos Fonnegra, Jasmine Garza, Travis Verta, Curtis Chen and many ERT officers use Colt M4A1 in different configurations.
Rifles
Accuracy International Arctic Warfare (Airsoft replica)
An Airsoft replica of the Accuracy International Arctic Warfare is used by a police sniper in "Family Time" (S01E09). It can be identified as an Airsoft replica by the lack of a cut-out in the magazine well, bright silver bolt visible through the ejection port, and the untapered barrel.
Future policemen (called Protectors) widely use this fictional handgun. This gun is a transformable multifunctional weapon with a holographic sight
Future Police Assault Rifle
Futuristic Police Assault Rifles are used by Kiera and others Protectors in the future which appear to be Jing Gong "Thunder Maul" airsoft guns. This is a complete airsoft gun based on the Seburo Type 06 IkaZuchi conversion kit manufactured by Poseidon Industries of Japan, who manufacture a number of fictional "Seburo" weapons inspired by Japanese Anime such as the CQB TYPE-0 "RAISEN" seen in Battlestar Galactica.