CSI Walter Simons (Omar Benson Miller) uses a Glock 17 as his sidearm during Season 9.
In "Sleepless in Miami" (S09E05), Peter Truitt (Stephen Amell) aims a Glock 17 at Horatio and Eric.
In "Last Stand" (S09E13), Memmo Fierro (Robert LaSardo) is seen with a Glock 17 before being arrested by Horatio.
In "Special Delivery" (S09E17), Marcos Trejo (Raymond Cruz) is seen with a Glock 17 when being detained by the MDPD.
Glock 26
Throughout Season 9, Natalia Boa Vista (Eva La Rue) uses a Glock 26.
In "Blood Lust" (S09E15), Dennis Baldwin (Jeff Branson) take's Boa Vistas Glock 26 and uses it to hold her hostage.
SIG-Sauer P226
Det. Frank Tripp (Rex Linn) uses a SIG-Sauer P226 as his duty weapon during Season 9.
In "Last Stand" (S09E13), during the drive-by shooting at the start of the episode, Sgt. Jennifer Swanson (Gloria Votsis) is seen returning fire with her SIG-Sauer P226.
SIG-Sauer P226 Elite
Eric Delko (Adam Rodriguez) uses a SIG-Sauer P226 Elite as his sidearm during season 9. The gun is identifiable as the Elite model because of its beaver-tail.
In "Reality Kills" (S09E06), an activist is seen with a Walther P99QA. Delko initially things the gun is real but later discovers that it is a pellet gun.
Unknown 1911
In "Blood Sugar" (S09E09), Luis Avilla (Ramón Franco) is seen with an unknown 1911 when confronting the man who had his son deported.
Revolvers
Unknown Revolver 1
In "Manhunt" (S09E04), Memmo Fierro (Robert LaSardo) is seen with a Gold Plated revolver which he steals from someone. He later uses it to shoot multiple people at Miami Dade Memorial Hospital.
Unknown Revolver 2
In "See No Evil" (S09E03), a gunman is seen with an unknown revolver which he aims at a blind man.
Submachine Guns
Intratec TEC-9
In "Last Stand" (S09E13), a Mala Noche gangmember is seen with a TEC-9 during a drive-by shooting. As in most films and TV shows, the gun is converted to fully automatic fire.
Assault Rifles
In "Last Stand" (S09E13), Mala Noche gangmembers are seen with AKMS rifles when attacking members of the MDPD.
Colt M4A1
In "Reality Kills" (S09E06), an MDPD officer is seen armed with a Colt M4A1. Horatio later takes the gun from him and aims it at a suspect.
Colt Law Enforcement Carbine
In "Happy Birthday" (S09E08), MDPD SWAT officers are seen with Colt Law Enforcement Carbines during a raid on a chop shop.
Unknown AR
In "Fallen" (S09E01), an unknown AR is used as part of a remote shooting platform to ambush the MDPD vehicle transporting Bob Starling, facilitating his escape.
Rifles
Heckler & Koch SR9
In "On the Hook" (S09E07), Dario Aguilar (Joseph Julian Soria) uses a Heckler & Koch SR9 that is chambered for 7.62 but fires a 5.56 round with a Sabot. As Calleigh explains, this allows a smaller caliber bullet to be fired from a higher caliber gun with now groves being left on the bullet.
Ruger Mini-14
In "Fallen" (S09E01), a Ruger Mini-14 is seen pointed at Melissa Walls when the CSIs come to ask her some questions. As it turns out, Melissa set the trap her self to make herself look like a victim.
Shotguns
Remington 870
In "Hunting Ground" (S09E16), Horatio (David Caruso) uses a Remington 870 with synthetic furniture to intimidate a suspect who has been hunting immigrants.