Castle

The following weapons were used in the television show Castle:

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Castle (2009 - ????)

Pistols

Glock 17

NYPD Detective's Javier Esposito (Jon Huertas) and Kevin Ryan (Seamus Dever) use a Glock 17 as their primary sidearms throughout the series. Detective Kate Beckett (Stana Katic) uses one until "Home is Where the Heart Stops".

Glock 17 - 9x19mm

Beckett taking cover with her Glock 17.

Ryan (Seamus Dever) holding his Captain (Not visible in this frame), rather than the suspect at gun point.

Glock 19

Detective Kate Beckett (Stana Katic) starts carrying the more compact Glock 19 during the events of "Home is Where the Heart Stops". Castle (Nathan Fillion) also uses Kate's while at the range, pretending to be completely inexperienced, then showing extreme proficiency after he's offered crime scene photos. Detectives Ryan and Esposito have started carrying Glock 19's, Det. Tom Demming (Michael Trucco) also carries one.

Glock 19 - 9x19mm

Beckett holds her gun on a suspect.

Castle (Nathan Fillion) at the range with Beckett (Stana Katic).

Glock 26

A Glock 26 serves as Det. Beckett's backup gun, it's most notably seen when she hands it to Castle to defend himself from the "Tick, Tick, Tick..." & "Boom!" killer when they enter the warehouse he's hiding in. He uses it to shoot Kate's Glock 19 out of the killers hand. After wards Castle reveals that "he was aiming for his head"

Noteworthy is that his "Aiming for the head" remark is the third Firefly/Serenity reference in the series. The first two took place during the episode "Vampire Weekend" when Castle wore his Mal costume, and the second was a catalyzer sitting on his bookshelf. A catalyzer is required for any Firefly class ship to run, and was a large part of Out of Gas' story arc.

Glock 26 - 9x19mm

"Want me to hold it while you tie your shoe?" - Beckett hands Castle her Glock 26.

Castle keeping Kate's Glock 26 ready.

Star Firestar M-43

Harrison Tisdale (Brian Avers) uses a stainless one in the pilot episode "Flowers for Your Grave".

Star Firestar M-43 - 9mm

Tisdale with his Firestar to Castle's head.

Heckler & Koch USP

A two tone USP was used by the "Deep in Death" killer to threaten Castle, then by Beckett after she disarms him.

Heckler & Koch USP - 9x19mm

‎The killer aiming his USP at Castle just after Beckett walks in.

Beckett (Stana Katic) holding the killers own USP at his head.

SIG-Sauer P226

NYPD officers are occasionally seen with this weapon. After disarming an officer, Rathborne holds Castle hostage with one.

SIG-Sauer P226 - 9x19mm, .357 SIG & .40 S&W

Unidentified NYPD officer holding his weapon.

SIG-Sauer P250

The victim had this in his waistband in the episode "Sucker Punch".

SIG-Sauer P250 - 9x19mm

Walther PP

Scarlett Price (Michaela McManus) used this pistol in "Love Me Dead".

Walther PP - 32 ACP

Scarlett Price (Michaela McManus) holding the Walther PP.

Walther PPK

IA Lt. Stan Holliwell (Scott Cohen) uses a suppressed PPK near the end of the episode "Den of Thieves".

Walther PPK - 32 ACP

Lt. Holliwell holds the PPK behind his back as he's confronted by Beckett and Castle.

Taurus Model 85 Modified

Castle (Nathan Fillion) is briefly seen with his Firefly modified Taurus 85 when trying his Mal costume on during the opening sequence of "Vampire Weekend".

Mal's modified Taurus Model 85 from Firefly.

Castle after bursting out of his office in his Mal costume and brandishing his custom Taurus.

Colt Detective Special

NYPD Captain Roy Montgomery (Ruben Santiago-Hudson) uses a Colt Detective Special in the episode "Sucker Punch".

Colt Detective Special - .38 Special

Smith & Wesson Model 625

The weapon used to kill Max Heller (Creagen Dow) in "Hedge Fund Homeboys".

Smith & Wesson Model 625 in 3" barrel model - .45 ACP

Smith & Wesson Model 15

A Smith & Wesson Model 15 is used by the killer in "One Man's Treasure". (I'm pretty sure the gun in the bag is a Model 15. Note the lack of an ejector rod shroud found on the Model 19)

Smith & Wesson Model 15 Combat Masterpiece with Hogue Grips - .38 Special

The killers Model 19 being presented to him in an evidence bag.

Ruger P90

The "Tick, Tick, Tick..." & "Boom!" killer uses this during his activities in "Boom!", FBI Special Agent Jordan Shaw (Dana Delany) briefly uses it near the end of the same episode.

Ruger P90 - .45 ACP

Special Agent Shaw holding the P90 on the killer.

The killers P90 sitting on a makeshift table.

Other Weapons

Heckler & Koch MP5A2

An MP5A2 with a weapon light, and Navy trigger group was used by a drug dealer while stealing a victims body in the season 2 premiere, "Deep in Death".

Heckler & Koch MP5A2 - 9x19mm

Heckler & Koch MP5K-PDW

During the events of "A Deadly Game", an MP5K-PDW is found in Roger Farraday's (Dean Cates) car. It was issued to him as part of a "spycation" where Farraday, under the guise of CIA hitman Sean Caldwell, was supposed to "assassinate" a foriegn minister with it.

Heckler & Koch MP5K-PDW - 9x19mm

The MP5K-PDW laying on the front passenger floorboard.

M4A1

Esposito (Jon Huertas), as well as most NYPD ESU officers use M4A1's when needed. FBI HRT agents can be seen wielding both M4A1's and HK416's during the episodes "Tick, Tick, Tick..." & "Boom!".

M4A1 - 5.56x45mm

Esposito (Jon Huertas) with his M4A1 after bursting through a door. Note the white Armalite trademarks, showing this is a Classic Army airsoft replica.

M16A2

Esposito (Jon Huertas) is seen with one during Castle's Halloween party, dressed up as his Generation Kill alter-ego Sgt. Antonio Espera.

M16A2 w/ M203 grenade launcher - 5.56x45mm/40mm

Heckler & Koch HK416

While not clearly seen, several FBI HRT agents use HK416's with 10" barrels.

Heckler & Koch HK416 - 5.56x45mm

An FBI HRT operator moving to his position with his HK416 in the ready position.

Remington 870

Esposito (Jon Huertas) uses a Remington 870 on multiple occasions throughout the season.

Remington 870 Police Magnum - 12 Gauge

Mossberg 500

The victim had this in his apartment in the episode "Sucker Punch".

Mossberg 500 - 12 Gauge