Holmes test fires a Beretta 92FS he found in Detective Bell's house in "Details". Harold Dresden (Richard Bekins) uses one after he disarms a NYPD plainclothes officer of his sidearm in "The Red Team".
A Glock 17 is seen in the hands of a few NYPD ESU officers as one of their main sidearms in tactical operations. It's also seen in a computer screen at a NYPD detective's office table in "A Giant Gun, Filled with Drugs". An injured security guard fires his Glock 17 at Alysa and her robbery crew in "Snow Angels".
A Glock 19 is used as one of the standard sidearms of uniformed NYPD officers. Serial killer Martin Ennis (Terry Kinney) takes a Glock 19 from a New York State Department of Corrections and Community Supervision guard after he's killed in "The Deductionist". Holmes shows off a Glock 19 to Ennis near the end of the same episode to see if he'll turn himself in or try to resist being captured alive. Isaac Proctor (Erik Jensen), an assassin working for Moriaty, uses a Glock 19 after he goes rogue in "The Woman". Detective Marcus Bell (Jon Michael Hall) appears to be armed with a Glock 19 as his main sidearm.
A Mauser C96 is used by a home invasion suspect as a murder weapon in "One Way to Get Off". Holmes and Watson secure the C96 hidden underneath the wooden floorboards of a suspect's hotel room.
Corrupt Drug Enforcement Agency officer Xande Molina (Michael Irby) takes aim with a Sig Sauer P226 at Joan and Rhys in "A Giant Gun, Filled with Drugs".
A Walther PPK was used by a dirty cop in "Details" as part of a plan to frame Detective Bell. During a debriefing, the pistol in question was chambered to fire .22 LR.
A Smith & Wesson Model 65 was seen in the Pilot episode when NYPD officers found in the hands of Peter Saldua (Craig Walker) after his corpse was uncovered.
This unknown MP5 was used in "Details" during an attack on Detective Bell's sedan. The show does not exactly depict what type of MP5 is used. It isn't a HK MP5K A1 or HK MP5K A5, because they have another sights, and it isn't HK MP5SD, because this model isn't suppressed.
Error creating thumbnail: File missingThe shooter fires the MP5 with the right hand during a drive-by shooting. We can see the standard sight and 30-round magazine.
Assault Rifles
Colt Law Enforcement Carbine
What appears to be a Colt Law Enforcement Carbine is seen in the hands of an Emergency Service Unit operator in "The Deductionist".
The Colt M4A1 serves as the main assault rifle of the NYPD's Emergency Service Unit in tactical operations.
Error creating thumbnail: File missingColt M4A1 Carbine with M68 Aimpoint reflex optic and Knight's Armament RAS railed handguard and vertical forward grip - 5.56x45mm.Error creating thumbnail: File missingA Colt M4A1 with picatinny railings and a mounted scope and tac light through a helmet cam in "Child Predator". It appears that the vertical foregrip wasn't used.Error creating thumbnail: File missingAnother M4A1 seen in the middle of the helmet cam screens in the same episode. This time, it has a mounted red dot sight.Error creating thumbnail: File missingA M4A1 used by ESU officers during a raid to search for Holmes and M in "M". Note the ACOG scope, the picatinny railing on the foregrip and the tac light attached on it.Error creating thumbnail: File missingAn ESU team prepares to breach a room near the conclusion of "The Red Team". Note that their M4A1s are outfitted with ACOG scopes and vertical foregrips, except for the ESU operator at the left side of the photo. The ESU operator with a ballistic shield is armed with what seems to be a Glock 17.
Shotguns
Benelli M4
A Benelli M4 was used in a door trap in a suspect's apartment room in "The Red Team", rigged to fire shotgun shells loaded with rock salt instead of buckshots when two NYPD officers entered the apartment, which unfortunately started the trap.
