Raymond Reddington examines a photo of a Beretta 92FS in a clear evidence bag in "Pilot". It's seen in a weapons cache of the Courier in "The Courier (No. 85)". One is seen in the armory of the FBI's black ops compound in "Anslo Garrick (No. 16)".
Colt M1911A1
What appears to be a Colt M1911A1 is seen behind the Beretta 92FS in "The Courier (No. 85)".
Colt Mark IV Series 80
Reddington uses a Colt Mark IV Series 80 as his main sidearm throughout "The Good Samaritan (No. 106)".
Colt M45A1 CQBP
A Colt M45A1 CQBP is used as the main sidearm of Anslo Garrick (Ritchie Coster), first seen in "Anslo Garrick (No. 16)Part 1".
CZ 75 SP-01 PHANTOM
Elizabeth finds a CZ 75 SP-01 PHANTOM in a box underneath the floorboards of her apartment belonging to her husband in "Pilot". In the box also include wads of American dollars and several passports.
CZ 83
An early model CZ 83 is used by Nestor (Bjorn Dupaty) to stop Liz and Ressler's investigation in "The Cyprus Agency (No. 64)" (S01E13).
FN Five-seveN USG
A FN Five-seveN is among the many weapons owned by the Courier in "The Courier (No. 85)" (S01E05).
Glock 17
Glock 17s are used by various FBI personnel throughout the series. One is most likely seen on the wall rack of an armory in the FBI's black ops compound in "Anslo Garrick (No. 16)". One of the armed men working for "The Judge" uses a Glock 17 when he captures Agent Cooper in "The Judge (No. 57)". A loaded Glock 17 is seen in an evidence photo near the end of "Ivan (No. 88)". Bank security guards use Glock 17s at the start of "Berlin (No. 8)".
Glock 19
A few FBI agents can also be seen with Glock 19s throughout the season with Ressler carrying it as his main sidearm for the rest of the season. One of Zamani's men has a Glock 19 in "Pilot". Wujing (Chin Han) and his thugs use Glock 19s in "Wujing (No. 84)". Reactivated CIA agent Meera Malik (Parminder Nagra) uses a Glock 19 as her main sidearm in the season, which first appears in the same episode. Reddington takes Ressler's Glock 19 and uses it for a short time in "Anslo Garrick" (No 16) Part 1". Owen Mallory (Campbell Scott) seizes Liz's Glock 19 and attempts to fire it before he's wounded by Ressler in "The Cyprus Agency (No. 64)". A loaded Glock 19 is seen in an evidence photo near the end of "Ivan (No. 88)". Stragenly enough, a Public Security Police officer is armed with a Glock 19 at the start of "The Pavlovich Brothers (No. 119-122)". Berlin agents operating in New York appear to use the Glock 19 as their primary sidearm.
Glock 26
Special Agent Elizabeth Keen (Megan Boone) carries a Glock 26 as her main sidearm, which showed up first in "Pilot" (S1E01). She somehow changes her sidearm to the Glock 19 in "The Courier (No. 85)". Tom Keen (Ryan Eggold) seems to use one in order to execute the Cowboy in the middle of "Mako Tanida (No. 83)" (S1E16).
Glock (unknown type)
A Haitian man appears to have a Glock pistol tucked in his waistband in "The Stewmaker (No. 161)". There's not enough details to determine what type of Glock pistol it is.
Heckler & Koch Mk 23 Mod 0
A Heckler & Koch Mk 23 Mod 0 is among the many weapons owned by the Courier in "The Courier (No. 85)" (S02E05).
A Wild Bunch mercenary holds Keen with a Heckler & Koch USP Compact aimed at her neck at the start of "Anslo Garrick (No. 16) Conclusion".
IWI Jericho 941 RPSL
An IWI Jericho 941 RPSL is used by Eric Trettel (Ryan O'Nan) aka the Alchemist near the end of "The Alchemist (No. 101)" as his main sidearm.
Makarov PM
A Makarov PM is used by Reddington in "Wujing (No. 84)" (S01E03)
Ruger P89
A Ruger P89 is used by Milton Bobbit (Damian Young) to threaten a businessman near the end of "Milton Bobbit (No. 135)".
SIG-Sauer P226
One of Dechambou's henchmen in "The Courier (No. 85)" (S02E05) carries what appears to be a SIG-Sauer P226.
SIG-Sauer P229
A SIG-Sauer P229 is used by FBI Special Agent Donald Ressler (Diego Klattenhoff), first seen in "Pilot". One of Dechambou's henchmen is armed with a P229 in the middle of "The Courier (No. 85)".
SIG-Sauer P229R
Later in the pilot episode (S01E01), Special Agent Ressler can also be seen using a SIG-Sauer P229R. This is most likely a continuity error, although it could be justified as Ressler would have lost his original pistol when jumping from the bridge during the kidnapping. Special Agent Aram Mojtabai (Amir Arison) uses one handed to him by FBI Assistant Director Cooper in the middle of "Anslo Garrick (No. 16)". Mako Tanida (Hoon Lee) uses a P229R as his main sidearm when he arrives in America in the middle of "Mako Tanida (No. 83)". One is seen seized by the Metropolitan Police Department near the end of "Ivan (No. 88)". Danny (Isiah Whitlock Jr.) uses one in the middle of "Milton Bobbit" (No. 135).
SIG-Sauer P229 E2
MPD officers in "Frederick Barnes (No. 47)" (S01E07) carry SIG-Sauer P229 E2s. One of these pistols is later taken by Frederick Barnes (Robert Sean Leonard).
SIG-Sauer P232
A stainless steel SIG-Sauer P232 is used by Perry (Wass Stevens) to murder an NYPD officer and a woman at the start of "The Cyprus Agency (No. 64)" (S1E13). A non-gun pistol that resembles a blued P232 is used by a rogue Federal Penitentiary Service (FSIN) officer coerced to hijack an unmarked cargo plane near the end of "Berlin (No. 8)". A blued SIG-Sauer P232 is used by Tom Keen (Ryan Eggold) is first used as his personal sidearm in "Berlin" (No. 8)".
Smith & Wesson 3914
A Smith & Wesson 3914 (NYPD DAO Auth. variant) is used by ex-SPLA guerrilla fighter Dembe Zuma (Hisham Tawfiq) near the end of "General Ludd (No. 109)".
Solothurn ITM AT84S
A Solothurn ITM AT84S is used by Ranko Zamani (Jamie Jackson) in "Pilot". A Solothurn is also used by an assassin to kill a CIA agent in Shanghai in "Wujing (No. 84)" (S01E03).
Walther P99
An armed General Ludd militant uses a two-tone Walther P99 when engaged in a shootout with Special Agents Keen and Ressler in "General Ludd (No. 109)".
Walther P99QA
The man surveiling Agent Keen's apartment in "Anslo Garrick (No. 16) Conclusion" (S01E10) carries a two-tone Walther P99QA.
Star Firestar
Revolvers
Smith & Wesson Model 36
A Smith & Wesson Model 36 is used by Reddington near the end of "The Good Samaritan (No. 106)" to wound Henry in the leg. Also uses it again when he confront Meera Malik at her house by the end of "The Alchemist (No. 101)", now being used as his personal sidearm.
Smith & Wesson Model 640/642
Either a Smith & Wesson Model 640 or a 642 revolver was used by Dr. Gideon Hadley (Ezra Knight) near the end of "The Cyprus Agency (No. 64)".
Unknown
Submachine Guns
FN P90
A FN P90 is seen on the wall rack of an armory in the FBI's black ops compound in "Anslo Garrick (No. 16) Part 1". A mercenary working under Anslo Garrick uses one in storming the compound in the same episode before Liz kills him and seizes the weapon from his corpse.
Heckler & Koch MP5A2
Royal Canadian Mounted Police (RCMP) Emergency Response Team operators sweep the kitchen of a restaurant in Montreal, Quebec armed with Heckler & Koch MP5A2s in "The Freelancer (No. 145)" (S01E02). A few FBI SWAT operators are armed with the MP5A2 when they search for Elizabeth near the end of "The Stewmaker (No. 161)" (S01E04).
Heckler & Koch MP5A3
FBI SWAT operators use them as their main submachine gun throughout the season. Some of the RCMP ERT operators are armed with Heckler & Koch MP5A3s in "The Freelancer (No. 145)" (S01E02). One is used by the Courier as his main weapon when he engages Liz and Malik in the middle of "The Courier (No. 85)". A few mercenaries working for Anslo Garrick are armed with MP5A3s that have railed handguards attached in "Anslo Garrick (No. 16)" and in "Anslo Garrick (No. 16) Conclusion". A few MP5A3s are partially seen on the wall racks of the FBI black ops compound's armory in the former episode. Most of Reddington's own mercenaries use them as their primary weapon near the end of "Anslo Garrick (No. 16) Conclusion". A Syrian Embassy security guard is seen armed with the MP5A3 in the middle of "Madeline Pratt (No. 73)". Berlin agents operating in New York use the MP5A3 as their primary weapon.
Heckler & Koch MP5K
A Heckler & Koch MP5K can be seen in Gina Zanetakos' appartment in "Gina Zanetakos (No. 152)" (S01E06).
Heckler & Koch MP5K-PDW
A Heckler & Koch MP5K-PDW is used by Anslo Garrick as his primary weapon, first seen in "Anslo Garrick (No. 16)". At least one of the Wild Bunch mercenaries uses one when Reddington's mercenaries storm Garrick's covert observation post near the end of "Anslo Garrick (No. 16) Conclusion".
Heckler & Koch UMP
A Heckler & Koch UMP is carried by one of the RCMP ERT operators in "The Freelancer (No. 145)" (S01E02). The magazine is not seen so it is not possible to determine the caliber.
IMI Uzi
An IMI Uzi is used by cartel gunmen to ambush FBI agents transporting a drug cartel suspect in "The Stewmaker (No. 161)" (S01E04).
KRISS Vector
One of the mercenaries who participate in raiding the FBI's black ops compound in "Anslo Garrick (No. 16)Part 1" is armed with a KRISS Vector outfitted with a suppressor and ACOG. Another mercenary in Garrick's hideout in "Anslo Garrick (No. 16) Conclusion" is armed with a Vector outfitted with a suppressor, EOTech sight and Surefire-type vertical foregrip.
Sa. Vz.61 Skorpion
A Sa. Vz.61 Skorpion is seen on the wall rack of an armory in the FBI's black ops compound in "Anslo Garrick (No. 16) Part 1".
Special Weapons MP-10
One of the Wild Bunch mercenaries carries a Special Weapons MP-10 fitted with a suppressor and EOTech sight in "Anslo Garrick (No. 16)" (S01E09). A pair of MP-10s also appear in the armory of the FBI's black ops compound in the same episode.
Unknown
Assault Rifles
AK-47
Public Security Police officers manning a covert Laogai at the start of "The Pavlovich Brothers (No.119-122)" are armed with AK-47s. They aren't used by the actual PSP since AK-based weapons are relegated to state-backed People's Liberation Army Militia and various reserve forces.
AKM
One Russian mobster near the end of "Madeline Pratt (No. 73)" is armed with what appears to be an AKM.
AKS-47
A couple of AKS-47s are seen in the hands of Russian mobsters near the end of "Madeline Pratt (No. 73)".
AKS-74U
An AKS-74U with a railed handguard is used by assassins to kill a CIA agent in Shanghai in "Wujing (No. 84)" (S01E03). Gina Zanetakos also has one in her apartment in "Gina Zanetakos (No. 152)" (S01E06). The same weapon is seen on the wall rack of an armory in the FBI's black ops compound in "Anslo Garrick (No. 16)". Russian mobsters use them when they confront the FBI near the end of "Madeline Pratt (No. 73)". All the Pavlovich brothers use them as their main weapon in "The Pavlovich Brothers (No. 119-122).
Colt Law Enforcement Carbine
Colt Law Enforcement Carbines are used by FBI SWAT/HRT operators and other personnel instead of Colt M4A1s as their main assault rifle. One is apparently seen in an Interpol red notice profile of ex-Sudan People's Liberation Army guerrilla fighter turned bodyguard Dembe in "The Freelancer". Bomb Squad officers of the Metropolitan Police Department of the District of Columbia are armed with LE Carbines in the same episode. One Colt LE is seen with an EOTech holographic sight mounted on the upper receiver via picatinny railing in the armory of the FBI's black ops compound in "Anslo Garrick (No. 16)". Virigina State Police Tactical Operations Team operators use Colt LE carbines near the end of "The Alchemist (No. 101)" after being summoned to deal with a hostage situation. One of the Pavlovich brothers in their Serbian hideout examines an LE Carbine at the start of "The Pavlovich Brothers (No. 119-122)"
Colt M16A2
What is presumably a Colt M16A2 is seen on the wall rack of an armory in the FBI's black ops compound in "Anslo Garrick (No. 16)". Abashiri Prison guards in Hokkaido, Japan are armed with M16A2s outfitted with torchlights at the start of "Mako Tanida (No. 83)" when Mako Tanida escapes from prison.
Enfield L22A1
An Enfield L22A1 is seen hanging from a rack at the armory in the FBI's black ops compound after being raided in "Anslo Garrick (No. 16)".
FN SCAR-L
A FN SCAR-L is among the many weapons owned by the Courier in "The Courier (No. 85)" (S02E05). One is seen hanging on a rack at the armory in the FBI's black ops compound in "Anslo Garrick (No. 16)".
Heckler & Koch G36K
A Heckler & Koch G36K is seen hanging at a wall rack of an armory at the FBI's black ops compound in "Anslo Garrick (No. 16) Part 1".
Heckler & Koch G36C
A Heckler & Koch G36C is used by one of Zamani's henchmen in "Pilot". Some of the RCMP ERT operators are armed with the G36C in Montreal in "The Freelancer (No. 145)" (S01E02).
LWRC M6A2
In a bit of continuity error, LWRC M6A2s are used sometimes to take the place of Colt LE Carbines in various episodes in the season.
SIG SG 552
A SIG SG 552 is seen hanging on the wall rack of an armory in the FBI's black ops compound in "Anslo Garrick (No. 16)". A Wild Bunch mercenary guarding Garrick's covert observation post is seen armed with the SG 552 before Reddington's mercenaries gun him down near the end of "Anslo Garrick (No. 16) Conclusion".
Steyr AUG
A Steyr AUG is seen hanging on the wall rack of an armory in the FBI's black ops compound in "Anslo Garrick (No. 16)".
Shotgun
Mossberg 500 "Persuader"
One of Reddington's mercenaries is armed with the Mossberg 500 "Persuader" near the end of "Anslo Garrick (No. 16) Conclusion" as the team infiltrates Garrick's covert observation post.
Remington 870
A FBI Special Agent uses a Remington 870, but without firing it in "The Stewmaker (No. 161)". One is used by a mercenary when Anslo Garrick leads a raid on the FBI's black ops compound in "Anslo Garrick (No. 16)", which consist of a short barrel, a short picatinny rail on the receiver and a M4-based stock.
Remington 870 Slug Gun
A FBI Special Agent uses a Remington 870 Slug Gun, but without firing it in "The Stewmaker (No. 161)".
Sniper Rifles
Remington 700PSS
A Virginia State Police Tactical Operations Team sniper uses a Remington 700PSS near the end of "The Alchemist (No. 101)" during a hostage situation. One is seen in Tom's hideout in the middle of "Mako Tanida (No. 83)". A FBI SWAT sniper uses one near the end of "Milton Bobbit (No. 135)".
Machine Guns
M61 Vulcan
A US Navy Grumman F-14 Tomcat uses a M61 Vulcan as its main machine gun, seen near the end of "Berlin (No. 8)".
RPK
The Pavlovich brothers use RPK light machine guns as their main weapon while they undergo a mission to capture Tom in the middle of "Pavlovich Brothers (No. 119-122)".
Rocket Launchers
FIM-92 Stinger
Reddington oversees the selling of FIM-92 Stingers in "The Stewmaker (No. 161)". He claims that the models are an improved version of the original FIM-92.
RPG-7
A RPG-7 is used by a cartel gunman to take out a Department of Homeland Security helicopter in "The Stewmaker (No. 161)". It's also seen in an evidence photo taken by the US military in the hands of a Taliban fighter in "The Judge (No. 57)."
Grenades
Model 7290
A Model 7290 flashbang is used by Reddington to stun a couple of mercenaries shooting at him in "Anslo Garrick (No. 16)" during the raid on the FBI's black ops compound.
Smoke Grenade
A mercenary working for Zamani hurls a smoke grenade inside the wrecked SUV in "Pilot".
Other
Evidence Photo
An evidence photo examined by the FBI task force is seen in "Mako Tanida (No. 83)".