In Season 3's "End Run" (S3E03), Brennen (Jay Karnes) holds a SIG-Sauer P226 with a silver slide and black hammer.
SIG-Sauer P226 (Nickel)
A nickel SIG-Sauer P226 is used by "Dead" Larry Sizemore (Tim Matheson), notably in Season 3's "Enemies Closer".
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.
Beretta 92FS Inox
In Season 3's "Good Intentions", Fiona is forced to disassemble and reassemble a Beretta 92FS Inox that's later held by Gabriel (Carlos Bernard).
Michael hands Nate a Beretta Cougar in Season 3's "Partners in Crime."
Colt M1911 Series
Colt 1911 series handguns are seen numerous times throughout the series. In "Friends and Family" (S3E01), a very shiny M1911 is used by Mike's old friend Harlan. In "Shot in the Dark", a 13 year old boy drops a disassembled M1911 before admitting that he plans to kill his stepfather.
"Pre-B" CZ 75
In "Partners in Crime" (S3E14), Conrad (Tom Nowicki), the Polish agent pulls a "Pre-B" CZ 75 on Michael.
CZ 75BD
In "The Hunter" (S3E06), both Michael and his new "friend" John Beck use a Czech CZ 75BD.
Desert Eagle
A nickel-plated Desert Eagle is seen in "Fearless Leader" (S3E04) when Sam is being audited as proof of his trip to the Middle East.
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
Glock 17's are used by Miami PD in the many instances when Mike tricks criminals into being arrested to solve his problem of the week. In Season 3, Detective Paxson (Moon Bloodgood) and Detective Lopez both carry Glock 17's. In "Question & Answer", Sam uses a Glock 17 while playing a corrupt detective. In Season 3's "Question & Answer", Sam uses a Glock 17 while playing a corrupt detective.
Heckler & Koch USP Match
A Heckler & Koch USP Match is briefly seen in the hands of a gun collector, Jonathan Carver (Scott Michael Morgan) when Michael is fleeing the scene of a fake car accident in "End Run" (S3E03).
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.
Heckler and Koch Mark 23
In "End Run" (S3E03), Michael is seen admiring a gun engineer's collection of guns, which includes a Heckler & Koch Mark 23.
IMI Jericho 941
The Stainless Jericho 941 is a very common sidearm used by bad guys in the show, especially the head bad guy in various episodes. (It's almost like what the Infinity is to Heroes.) It's used in "Question & Answer." A black Baby Eagle was used by the henchmen in "End Run" and in "Enemies Closer" and also is the gun used by Strickler in "Long Way Back."
Jericho 941FB Compact
In Season 3's "Enemies Closer" (S3E13), the drug dealer Carlos (Carlos Gomez) pulls his Jericho 941FB Compact on Michael.
Kahr K9 Stainless
In Season 3's "Friends Like These", Sam pulls his backup Kahr K9 stainless from an ankle holster after Ex-Serbian Intelligence officer Milovan Drago disarms him of his Beretta. After firing it several times at Milovan, he later uses it in the shootout at Bennet Tash's locksmith store.
STI Edge
In "End Run" (S3E03), Michael is seen admiring a gun engineer's collection of guns, which includes a STI Edge.
Ruger Mk I
In "End Run" (S3E03), Michael is seen admiring a gun engineer's collection of guns, which includes a Ruger Mk I. Pretending to be an idiot, Michael asks if it is a 357.
Along with her PPK/S, Fiona also owns a Walther P99 that she keeps in her apartment which Michael uses when searching for an intruder in "Shot in the Dark".
In Season 3's "End Run", Sam and Fiona carry MP7's when they break into Brennan's house. Fiona and her brother when they attempt to kill O'Neil at his hotel in Season 3's "Long Way Home".
A variant of the Intratec TEC-9 series of assault pistols (either the KG-99 or the TEC-9 itself) can be seen being used by thugs in Season 3's "Fearless Leader" (S3E4).
Shotguns
Mossberg 500 (Sawed off)
In Season 3's "Noble Causes" (S3E12), Sugar (Arturo Fernandez) is armed with a Mossberg 500 with sawed-off barrel and stock when some thieves want "to go Tombstone" on him.
Mossberg 500 Cruiser (Foregrip and saddle shell holder)
A Mossberg 500 Cruiser fitted with a foregrip and saddle shell holder is a frequently used shotgun in the series.
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. In some episodes, the shotgun is seen with a foregrip on the pump.
Mossberg 590 Special
In Season 3's "The Hunter" (S3E06), Beck's men are armed with Mossberg 590 shotguns as they round up the hit squad.
Serbu Super Shorty
A Serbu Super Shorty is carried by Fiona while rescuing a kidnapped child in Season 3's "Question and Answer."
Assault Rifles
M4A1 Carbine
In "Friends & Family" (S3E01), Mike's "old buddy" and Special Forces operator Harlan (Brian Van Holt) carries an M4A1 fitted with an M203 grenade launcher, PEQ-2 IR pointer, Surefire light, Aimpoint CompM4 red dot sight, and 3X magnifier to fire into the windshield and engine block of an SUV to disable it during a snatch-and-grab op to kidnap a Venezuelan gangster.
SIG SG 552
The SIG SG 552 assault rifle is a frequently used weapon in the series. In Season 3's summer finale "Long Way Back", Mike uses a SIG rifle when he and Sam go to rescue Fiona. Mike is seen with one slung over his shoulder in "Friendly Fire" (S3E11) when repelling out a window. In "Enemies Closer" (S3E13), Mike gives a SIG with a scope attached to a drug dealer shoot up a car.
Sniper Rifles
Bushmaster XM15 "V-Match"
A Bushmaster XM15 "V-Match" fitted with a scope and bipod is used by Sam to provide cover in Season 3's premiere "Friends and Family", as well as when he and Michael go to save Fiona in the Season 3's summer finale "Long Way Back".
Remington 700 AICS
One of the preferred sniper rifles used by Michael is the Remington 700 AICS.
Winchester Model 70
A Winchester Model 70 is frequently used by Sam to cover Mike or to provide distractions.
Heavy Weapons
Browning M2HB
In Season 3's "Good Intentions" (S3E15), a Browning M2HB is seen being prepped by Mason Gilroy (Chris Vance) to be used for a particular job.
M60
In Season 3's "End Run", an M60 is briefly seen as Sam and Fiona infiltrate the home of Brennan (Jay Karnes).
M203 Grenade Launcher
In Season 3's premiere "Friends and Family" (S3E01), Harlan (Brian Van Holt) is armed with an M4A1 with an M203 grenade launcher attached underneath. He is not seen using it in the episode.