Colonel John Casey (Adam Baldwin) continues to carry the custom SIG-Sauer P229 as his sidearm. The SIG is fitted with Crimson Trace laser grips, and with the flat surfaces polished on the slide, as well as the controls, trigger, and hammer. According to dialogue from "Chuck Versus the Colonel", the gun is a 9mm. Morgan Grimes (Joshua Gomez) is trained with this exact same weapon in "Chuck Versus the Role Models" (S3E15), which he identifies as a "SIG 229, 9mm, full metal jacket, with laser grips" (one of the many in-jokes in the series, as Adam Baldwin co-starred in the film Full Metal Jacket). He then explains that he learned about guns from playing first-person shooter video games. Devon Woodcomb (Ryan McPartlin) holds the SIG in "Chuck Versus the Subway" (S3E18).
SIG-Sauer P229
Casey saves Chuck with a standard P229 in "Chuck Versus the Final Exam" (S3E11). Justin Sullivan carries a standard P229 as his sidearm, notably in "Chuck Versus the Subway" (S3E18), and "Chuck Versus the Ring Part II" (S3E19).
SIG-Sauer P229R
When Chuck (Zachary Levi) takes his "Red Test" in "Chuck Versus the Final Exam" (S3E11), he is given a brand-new SIG-Sauer P229R as new standard sidearm. He is seen with it in both "Chuck Versus the American Hero" (S3E12) and "Chuck Versus the Other Guy" (S3E13). Rafe Gruber appears to use one in "Chuck Versus the Fake Name" (S3E08). In "Chuck Versus the Final Exam" (S3E11), Casey is seen with a P229R before Chuck gives him his custom SIG back, as a token of gratitude for saving his life.
A Beretta 950 Jetfire with nickel plating and pearl grips is used by the Flight Attendant Assassin (Josie Davis) in "Chuck Versus First Class" (S3E05). She notably shoves the barrel up Chuck's nose. This is most likely the same gun that was used by Eva Mendes in The Spirit, since ISS supplied the weapons for that movie, as well as this series.
Beretta 950 Jetfire
Another Beretta 950 Jetfire is seen used in a continuity error by Sarah in "Chuck Versus the Role Models" (S03E15). After Chuck and Sarah dash out of the room, the Jetfire turns into a black Walther PPK.
Beretta 92FS
A Beretta 92FS is pulled by an undercover agent in "Chuck Versus the Pink Slip" (S3E01).
Two-Tone Beretta 92FS
A security guard at the Crystal Towers in downtown Los Angeles who stops Devon Woodcomb flashes a Two-Tone Beretta 92FS holstered on his belt, in "Chuck Versus Operation Awesome" (S3E04).
Beretta 92FS Inox
Beretta 92FS Inox pistols are pulled by undercover agents in "Chuck Versus the Pink Slip" (S3E01).
Colt Mustang
In "Chuck Versus the Final Exam", CIA Agent Hunter Perry (Kyle Bornheimer) pulls a Colt Mustang from his ankle holster. In Season 3's "Chuck Versus the Other Guy" (S3E13), Sarah is also seen pulling the Colt Mustang.
Colt XSE 1911
In "Chuck Versus the Pink Slip" (S3E01), Chuck (Zachary Levi) holds the stainless railed Colt XSE 1911 in the opening mission in Prague, Czech Republic.
FN Five-seveN
The FN Five-seveN is the weapon of choice for operatives of the Ring. The pistol fitted with a laser sight is also used by Ring operative Javier Cruz (Adoni Maropis) in "Chuck Versus the Pink Slip" (S3E01) and by Sydney Prince (Angie Harmon) in "Chuck Versus Operation Awesome" (S3E04).
Glock 17
The Glock 17 is briefly seen held by a government agent in "Chuck Versus the Pink Slip" (S3E01).
Heckler & Koch HK45C
Daniel Shaw (Brandon Routh) carries the Heckler & Koch HK45C as his sidearm in Season 3. Casey uses an HK45C in "Chuck Versus the Tic Tac" after he handed over his Government Issue P229.
Heckler & Koch USP (Stainless Slide)
The Heckler & Koch USP with a stainless slide is also a frequently used handgun in the series. In "Chuck Versus the Honeymooners" (S3E14), Sarah and Chuck are threatened by Interpol operatives that carry the USP's with stainless slides. Sarah is later seen holding the weapon.
Heckler & Koch USP Compact
In "Chuck Versus the Living Dead" (S3E17), Ellie (Sarah Lancaster) retrieves a two tone Heckler & Koch USP Compact from a speaker box she received from Ring agent Justin Sullivan (Scott Holroyd) when she hears someone in the house.
Heckler & Koch P7M13
A Heckler & Koch P7M13 in satin nickel finish is pulled by Elia (Lela Loren) in "Chuck Versus the Honeymooners" (S3E14).
IMI Jericho 941
Sarah dual-wields a blued and a stainless Jericho at "Weap-con" in Season 3's "Chuck Versus the Nacho Sampler" (S3E06). Laura Turner (Swoosie Kurtz) holds the Jericho on Sarah and Chuck in "Chuck Versus the Role Models" (S03E15).
IMI Jericho 941 (Stainless)
Sarah holds a stainless Jericho and Chuck a blued one in "Chuck Versus the Role Models" (S3E15). Otto Van Vogel (Udo Kier) holds a reverse duo-tone Jericho (Black with Stainless Slide) in the same episode.
IMI Desert Eagle Mark I
Casey uses a gold IMI Desert Eagle Mark I at Weap-con in Season 3's "Chuck Versus the Nacho Sampler". It is very likely that the gold Desert Eagle was one of the same guns built for Austin Powers in Goldmember, although the ivory grips were removed for this series. Independent Studio Services, the armorers who supplied the weapons for Chuck, also supplied weapons to Goldmember.
Makarov PM (Stainless)
In "Chuck Versus the Angel de la Muerte" (S3E03), several soldiers that accompany Premier Alejandro Goya (Armand Assante) wield nickel-plated Makarov PM pistols.
NAA Guardian
Sarah holds what appears to be an NAA Guardian pistol from her purse when confronting a tiger in "Chuck Versus the Role Models" (S03E15). As with many weapons in the series, this pistol appears to be the same one used in the film Mr. & Mrs. Smith. In a continuity error, what appears to be a Beretta Jetfire is seen.
Sphinx AT 2000
A Sphinx AT 2000 pistol in "duotone" finish is pulled by a thug during a standoff in "Chuck Versus the Three Words" (S302).
Walther PPK
In a continuity error, Sarah's Beretta Jetfire turns into a Walther PPK in "Chuck Versus the Role Models" (S03E15). Sarah pulls a PPK out of her coat pocket in a flashback to her Red Test in "Chuck Versus the American Hero" (S3E12).
Walther PPK "Non-Gun"
In flashbacks seen in both "Chuck Versus The Final Exam" and "Chuck Versus the American Hero", Sarah pulls a Walther as part of her own "Red Test" when she is seen confronting Evelyn Shaw. The gun she uses appears to be a Non Gun Walther PPK.
Walther PPK/S
Laura Turner (Swoosie Kurtz) is seen pulling a Walther PPK/S with pearl grips on Sarah and Chuck in "Chuck Versus the Role Models" (S03E15).
Unknown Pistol
An unknown pistol is seen on the poster of "Sans Respirer" in Morgan's office, in "Chuck Versus The Nacho Sampler" (S3E06).
Revolvers
Taurus Model 605
In "Chuck Versus the Fake Name" (S3E10), a Taurus Model 605 revolver is held by Matty (Tony Sirico) and then Chuck.
Submachine Guns
FN P90
The FN P90 is seen displayed at "Weap-Con" in "Chuck Versus the Nacho Sampler". Guards armed with FNP90's are taken out by Sarah in "Chuck Versus the Tic Tac" (S3E10).
Rifles
AKM
An AKM rifle is held by a gunman in the Republic of Congo in "Chuck Versus the Role Models".
AKMS
An AKMS rifle is held by a gunman in the Republic of Congo in "Chuck Versus the Role Models".
AKMSU
In "Chuck Versus the Angel de la Muerte" (S3E03), Premier Alejandro Goya's soldiers carry AKMSUs with full black furniture. Sarah also is seen holding one in the same episode.
FN F2000
The FN F2000 Tactical is seen displayed at "Weap-Con" in "Chuck Versus the Nacho Sampler". Guards armed with FN F2000's are seen in "Chuck Versus the Tic Tac" (S3E10).
M4A1
The Colt M4A1 is used primarily by Tac teams and Casey in Season 3.
M16A1
In a flashback to Honduras in 1989, troops are armed with M16A2 rifles in "Chuck Versus the Tic Tac" (S3E10).
Sniper Rifles
Blaser R93 Sniper Rifle
In "Chuck Versus the Three Words" (S3E02), hitman Karl Stromberg (Vinnie Jones) uses a Blaser R93 Sniper Rifle to wound a man who stole his case. (The name is a homage to the main villain in the James Bond film The Spy Who Loved Me.)
Remington 700 AICS
In "Chuck Versus the Fake Name" (S3E08), Casey uses a suppressed Remington 700 mounted on an Accuracy International Chassis System to fire a tranquilizer dart in order to capture Rafe Gruber.
AIG Asymmetric Warrior ASW338LM
In "Chuck Versus the Fake Name" (S3E08), Chuck takes the identity of Rafe Gruber, the world's most dangerous assassin, and is taken to an apartment where an AIG Asymmetric Warrior ASW338LM is set up for a hit. The real Rafe Gruber (Johnny Messner) later is seen in the apartment and looks through the rifle's scope. John Casey finally is seen using the rifle and says apparently he's one of 5 people in the world that can make that shot.
Shotguns
Ithaca 37
In "Chuck Versus the Angel de la Muerte" (S3E03), Casey is seen taking out a Ithaca 37 with a nickel finish, pistol grip and extended mag barrel from a hidden compartment in his apartment. The shotguns are on the left in the compartment. Chuck tosses the Ithaca 37 to Sarah in the episode.
Mossberg 500
A Ring agent is briefly seen armed with a Mossberg 500 shotgun before being taken out by Casey in "Chuck Versus the Pink Slip" (S3E01).
Mossberg 590 Mariner
In "Chuck Versus the Angel de la Muerte" (S3E03), Casey grabs a Mossberg 590 Mariner fitted with a pistol grip and saddle shell holder. 2 Mossbergs are seen in Casey's apartment in "Chuck Versus the Tic Tac".
Mossberg 590 Cruiser (Folding Stock and Door Breaching Brake)
Shaw shoots open a door in Castle with a Mossberg 590 Cruiser with folding stock and door breaching brake in "Chuck Versus the Mask" (S3E07).
Machine Guns
Handheld M134 Minigun
Preparing to leave the Castle, John Casey packs up a handheld configuration of the M134 Minigun, lamenting that he never got to use it. He later is able to use it while rescuing Sarah and Chuck from a Ring facility in "Chuck Versus the Pink Slip" (S3E01).
M1919A4 .30 Caliber Machine Gun
The Browning M1919A4 .30 caliber machine gun is displayed among the many weapons at the Weap-Con in "Chuck Versus the Nacho Sampler" (S3E06).
Browning M2HB
A Browning M2HB machine gun is displayed among the many weapons at the Weap-Con in "Chuck Versus the the Nacho Sampler" (S3E06).
Other
Opening Credits Pistol
A pistol is seen in silhouette during the opening credits of each episode of Chuck. This pistol appears to be an amalgamation of a Beretta and a Jericho 941.
Tranquilizer Baby WE Hi-Capa 3.8 (Type 8)
Beginning in Season 3, Chuck is seen using a "Tranq Gun" frequently as his weapon of choice. This weapon is in reality an airsoft handgun known as the Baby Hi-Capa 3.8. In the series, the airsoft pistol is customized to fire tranquilizer darts with the standard "Green Gas" rather than airsoft pellets. It is also customized with an extended barrel due to painting over the orange tip (required by US law), with metallic silver paint. A red or green laser sometimes accompanies the gun on it's bottom accessory rack. The ammunition is varied, but most commonly used are the "10mg Darts". The darts can also be stuck manually into someone to gain the same effect. It has been referred to several times that the medication in the darts is a diluted Tetradotoxin (Anhydrotetrodotoxin) solution. There is another kind of dart that has a fast-acting small dose of Ketamine. The vents on the slide indicate that it is a Type 8. The tranq guns are often used on unarmed/unsuspecting persons instead of more lethal weapons.
Zamibian Tranquilizer Gun
Dr. Kowambe's henchmen carry some kind of trank guns that are fitted with red dot sights, in "Chuck Versus the Tooth" (S3E16).
Palmer Cap-Chur Short Range Projector
Another is seen at the Weap-Con in "Chuck Versus the Nacho Sampler" (S3E08).
Tranquilizing Syringe Gun
A type of syringe gun is used to tranq Chuck, and get him out of the presence of General Beckmann, in "Chuck Versus the Pink Slip" (S3E01). A similar prop was used in the film Mission: Impossible III.
Armories and Gun Displays
"Castle"
"Castle", is the code name for the underground CIA/NSA substation where Sarah, Casey, Chuck, and Morgan communicate with their superiors (mainly General Diane Beckman). Castle is located underground somewhere between the former Orange-Orange and the current Buy More. It is comprised of a main area for team debriefing, a video conference room for federal debriefs comprised of a series of large computer screens, 2 prisoner wings (1 solitary, 1 bulletproof acrylic holding cells), 1 interrogation wing, a Dojo for martial arts practice, an armory with a huge selection of weapons including 3+ Casey custom SIG P229s, a shooting range, and a scientific analytical labratory, 1 wing that was used for the National Clandestine Service with maximum security holding cells, now it is used as a maximum security prisoner holding facility.
"Weap-con"
In "Chuck Versus the Nacho Sampler", a massive fictional weapons conference known as "Weap-con" features many weapons. In addition to the very prominently displayed ones, there are few that are only briefly glimpsed on weapons racks in the background.
Casey's Apartment Armory
Casey keeps a hidden armory in his apartment that's seen in "Chuck Versus the Angel de la Muerte" (S3E03).
Chuck's Apartment Sofa Armory
In "Chuck Versus the Role Models" (S3E15), Sarah created a mini armory in Chuck's sofa due to the "30 ft. rule" without Chuck's approval. Please note the inscription on the Tranq Guns. Blurry though it may be, it reads "BABY HI-CAPA 3.8"
Gunrunner Armory
Throughout several episodes of the show, usually whenever Chuck "flashes" on gun-runners or other criminals, the Intersect shows him pictures of large armory rooms full of guns. All of these images are pictures of the weapons vault of Independent Studio Services, the company which supplies the weapons and other props used on Chuck. If you've ever been curious to know what a Hollywood prop house's armory looks like, now you know!