In Season 5's premiere, "Company Man", CIA officer Max (Grant Show) carries one as his sidearm. Agent Pearce (Lauren Stamile) also carries one, notably seen in Season 5's "Dead to Rights".
SIG-Sauer P226
In Season 5's "Army of One", a SIG-Sauer P226 is taken off a hostage taker by Michael that he later gives to his mother Madeline to use.
Agent Dani Pierce (Lauren Stamile) also carries a SIG-Sauer P226 as her sidearm.
SIG-Sauer GSR
What appears to be a nickel-plated SIG-Sauer GSR is held by Dion Carver (Andre Holland) in Season 5's "Breaking Point" (S5E14).
American Tactical Imports FS9 (TiSAS Zigana Sport)
In Season 5's "Necessary Evil" (S5E15), the Liberian warlord Joseph Kamba (Jonathan Adams) uses an ATI FS9 Sport, the US import version of the TiSAS Zigana Sport.
Beretta 92FS
Sam Axe (Bruce Campbell) carries a Beretta 92FS as his personal sidearm throughout the series. The Beretta has also seen use by various other characters throughout the series' run, in both suppressed and unsuppressed forms.
Colt M1911 Series
Colt 1911 series handguns are seen numerous times throughout the series.
FN FiveseveN
In Season 3's summer finale "Long Way Back", bloodthirsty hooligan Thomas O'Neill (Paul Blackthorne) uses a FN FiveseveN to hold Fiona hostage.
Glock 17
In Season 5's "Mind Games", Fiona is seen putting a "standard police-issue" Glock 17 in a box in order to frame a loan shark as being an undercover cop.
Glock 26
In Season 5's "No Good Deed" (S5E04), Eve (Aviva Farber) carries a Glock 26 as her sidearm.
Heckler & Koch USP Compact
In Season 3's "Long Way Back", Fiona gives Michael her USP Compact with a stainless slide which he says is a .45 caliber. He then uses it when confronting Strickler. Fiona is seen using her USP Compact in Season 2.
In Season 5's "Depth Perception" (S5E16), Jessie Porter (Coby Bell) takes a Smith & Wesson M&P Compact off a Cayman Islands banker and holds it on him.
Mossberg 500 Persuader (Folding Stock and Door Breaching Brake)
A frequent shotgun seen used in the series is a Mossberg 500 Persuader fitted with a police folding stock, saddle shell holder, and door breaching brake.
USAS-12
In "Breaking Point" (S5E14), Michael is seen showing off a variety of weapons to gangster Dion Carver, which includes a USAS-12.
Assault Rifles
Heckler & Koch HK91
The Heckler & Koch HK91 is used in several of Season 5's episodes. Michael takes one off a guard in Season 5's "Enemy of My Enemy". It's also seen in the hands of a militia leader in Season 5's "Besieged". The rifle is specifically identified by name as the weapon used in the murder of a war criminal in Season 5's "Army of One".
In "Besieged", both Fiona and Sam are seen carrying the G36C.
M4A1 Carbine
In "Army of One", Sam provides cover for Michael with an M4A1 that is fitted with an Ace stock. In Season 5's "Better Halves", Michael fends off some assassins with an M4A1 fitted with a EOTech sight and mags taped together "jungle" style.
SIG SG 552
A completely black SIG SG 552 assault rifle is used by Fiona in Enemy of My Enemy" (S5E06). A SIG SG552-2 fitted with an EOTech sight is held by Fiona in Season 5's "Damned If You Do..." (S5E13).
Sniper Rifles
Barrett Model 98 Bravo
In Season 5's "Square One" (S5E05), former Special Forces sniper Ethan (Matt Lauria) is seen using a Barrett Model 98 Bravo sniper rifle to take aim at the man who put his sister in the hospital.
Grendel SRT
In Season 5's "Dead to Rights", Fiona uses a Grendel SRT rifle to fire two rounds into a window of the British consulate. In Season 5's "Depth Perception" (S5E16), Fiona provides cover with the Grendel.
Sako TRG-42
In Season 5's "Depth Perception", an outed Russian spy is seen using a Sako TRG-42 rifle throughout the episode to try and eliminate Sam and Beatriz.
Winchester Model 70
A Winchester Model 70 is frequently used by Sam to cover Mike or to provide distractions.
Heavy Weapons
RPG-7
In Season 5's "Breaking Point" (S5E14), Michael is seen showing off a variety of weapons to gangster Dion Carver, which includes an RPG-7. Carver is later seen using the RPG on a truck.
Other
M67 Hand Grenade
In Season 5's "Army of One", Holcomb also threatens the hostages with an M67 hand grenade. He later gives the grenade for Michael to use.
Advanced Taser M26
Fiona is seen using an Advanced Taser M26 on a kidnapper in Season 1's "Hard Bargain". Fiona uses one to taze Sam's computer buddy in Season 5's "Army of One".
Molotov Cocktail
Michael tosses a Molotov Cocktail into a con artist's sports car in Season 5's "Square One"
Zip Gun
In Season 5's "Army of One", Michael assembles an improvised Zip Gun that he uses to wound a hostage taker.
Simunition
In Season 5's "Acceptable Loss", Michael is seen loading Simunition training rounds into a Beretta.