Snipers Ed Lane (Hugh Dillon), Juliana Callaghan (Amy Jo Johnson), and Sam Braddock (David Paetkau) use Remington 700PSS rifles chambered in .308 caliber(Despite their stock slung ammo being .300 Win Mag) and they are fitted with scopes with false reticules.
Now that I see some clearer shots of these guns, I don't think they are PSSs, the scope mount isn't right. - Gunmaster45
Luger P08
The hostage taker in the first episode shoots a woman in the back with a Luger P08 and holds another woman at gunpoint with it before being shot by Ed Lane's sniper rifle. Used by hostage takers son to hold ed hostage in later episode.
Heckler & Koch MP5A3
Sgt. Gregory Parker regularly has two or more officers armed with H&K MP5A3s with tri-rails, Navy trigger groups, and forward grips at his side. Several other officers use them as well.
Glock 17 second generations are the issued sidearms of the SRU team through season 1.
By the second episode "Backwards Day", Season two, many of the Glocks are now 3rd generations and are outfitted with tactical flashlights.
By the third episode "Haunting The Barn", we finally see Sgt. Parker draw his Glock. We also see Ed Lane has been outfitted with one of these Glocks.
Glock 26
Juliana's sidearm at the start of Season 2 is a Glock 26. This gun was likely chosen because Amy Jo Johnson's hands were too small to hold the full sized Glock 17 so the subcompact model was selected.
M4A1
Several officers use M4A1 carbine assault rifles as standard-issue weapons. Juliana uses one in the second episode to watch over a father with a gun in the hospital. It is fitted with a red-dot sight but when she looks through it, it incorrectly has a sniper reticule instead. By episode seven, just about all the main officers have used M4A1s. The props weapons used are not the similar Canadian-made Diemaco C8 carbine, which would be more appropriate for a Canadian SWAT team to use, since Diemaco (now Colt Canada) does not sell its weapons to civilian companies (including the armorers who worked on the show).
Smith & Wesson 5904
When a man becomes enraged that his daughter can't get a new heart, he draws a Smith & Wesson 5904 off a hospital guard and begins a standoff. He accidentally scores a non-fatal shot on an officer after less lethal is ordered to stop him when he reveals the safety is on, and then turns it off and hits an officer's vest.
Taurus Judge .410/.45 LC
In the 3rd episode dialogue, the Taurus Judge Kennon carried is called the "Jury", street name. "Takes 5 rounds, shotgun, single bore." Exact lines.
It is actually a Taurus Judge firing the very slim .410 shotgun round and can also accept .45 LC rounds.
Smith & Wesson 5906
In the 4th episode, a Smith & Wesson 5906 with a rounded trigger guard (yes, they can have different trigger guards and be the same model) was used by the outraged woman, Rebecca Kessfield (Chandra West).
Deftech/Federal Labs Revolving Launcher
The 6 shot 40mm Deftech rotarary grenade launcher for Law enforcement first seen in episode 4 is used by Sam Braddock (David Paetkau). Wasn't fired.
Beretta 92FS
A Beretta 92FS is used by the bank robber in episode 5, Season 1 "Who's George?". It is also used by the suicidal veteran SRU officer in episode 3, Season 2 "Haunting The Barn".
Smith & Wesson Model 36
Seen in episode 6 is a Smith & Wesson Model 36 owned by a female gang member, taken by an innocent that was bullied and used against them.
Unknown old fashion revolver
In episode 7. A boy took out an old revolver that according to dialogue was carried by his great-grand father and his grandfather. So we can assume it's an old piece. Maybe a Single Action Army or something like that.
Not an SAA, I don't see an ejector piece.
From the looks of the first picture, it looks to me like a S&W model 3 revolver.
This series takes place in Canada and the father says that it was taken ashore at Juno beach on D-day, so what did the Canadians use as a sidearm in WWII? Webley?
SIG-Sauer P228
The leader of the female gang uses a SIG-Sauer P228 in episode 6.
Federal M201-Z Grenade Launcher
The Federal M201-Z Grenade Launcher is used in Season 1, Episode 7 by Juliana. It is also seen used by Sam Braddock in "Eagle Two", Season 2, Episode 1. Again it is used by an SRU member in Season 2, Episode 2, "Backwards Day", but it was not fired.
CornerShot with Glock attachment
Seen being used by Ed Lane in episode 9 "Planets Aligned" is a CornerShot, both with an without an ACOG scope (which is rather useless on a CornerShot anyway). A Glock 17 is fitted on the end.
Remington 870
Seen in episode 9, season 1 to use as a door breaching weapon is a Remington 870 police magnum.
Seen in episode 4, season 2 in the station's armory.
Heckler & Koch G3
In season 2, episode 4, the son of the shooter in the first episode uses a Heckler & Koch G3 rifle (specific make unknown) to snipe people from city hall. Braddock can identify this rifle by simply looking at the shell casing, because apparently the "HK G3" is the only 7.62mm gun ever made.