The Beretta 92FS is seen with various characters in the season.
Beretta 92FS Inox
A Beretta 92FS Inox was used by Oliver when he was in Russia in "Second Chances" and later in "Disbanded". He later uses it after he's forced to hide his Arrow identity near the end of the season.
Beretta 93R
A Beretta 93R (made from a Beretta 92FS and made to fire full auto) is seen with a mob soldier near the end of "Legacy". Rene Ramirez aka Wild Dog (Rick Gonzalez) uses them as his main sidearms in the season.
Beretta Px4 Storm Compact
A Beretta Px4 Storm Compact is used by Rene as his personal sidearm when operating in civilian clothes under City Hall.
Colt Government Model
What appears to be a Colt Government Model is used by a drug dealer in a flashback in "Spectre of the Gun".
CZ 75
A CZ 75 is used by Oliver while in Russia in "The Sin-Eater", "Fight Fire with Fire" and in "Missing". Konstantin Kovar (Dolph Lundgren) uses it in "Lian Yu".
CZ P-07 Duty
The CZ P-07 is seen with a Russian Bratva Avtoritet named Vitkor (Mike Dopud) in a flashback sequence in "Legacy". Oliver uses it briefly in "Fight Fire with Fire".
The Glock 17 is seen with ex-CCPD officer Dinah Drake (Juliana Harkavy) in "Second Chances". Diggle and Vigilante use them as their sidearm of choice.
Glock 18C
The Glock 18C is used by Dinah in "Disbanded", albeit with a stainless slide.
IMI Uzi Pistol
Several IMI Uzi Pistols are used by Tobias Church's soldiers when they kidnap Oliver and three Star City councilors in the middle of "Legacy".
Makarov PM
A Makarov PM is used by Ishmael Gregor (David Meunier), godfather of the Solntsevskaya Bratva in a flashback sequence in "Who are You?" and in "The Sin-Eater".
MP-446 Viking
M1911A1
A M1911A1 is used in "Lian Yu" by Digger Harkness.
Sa. Vz.61 Skorpion
A Sa. Vz.61 Skorpion without any folding stock is used by a Russian mafia Bratok in "Second Chances". Some of Kovar's Bratoks use them in "Kapiushon".
SIG-Sauer P226
The SIG-Sauer P226 return in the season as the sidearm for some Star City Police Department officers. A plainclothes ARGUS agent uses it, but is quickly disarmed in "Dangerous Liaisons".
Stechkin APS
What appears to be a Stechkin APS is used by Rory Regan (Joe Dinicol) while posing as Felicity's close protection bodyguard in "Bratva".
Taurus PT911
A Taurus PT911 is used by Evelyn Sharp (Madison McLaughlin) in an ambush in "Lian Yu".
Taurus PT92AFS
The Taurus PT92AFS with pearl grips is used by a human trafficker at the start of "Vigilante".
Walther P99
Walther P99s are used by some of Kovar's Bratoks in a flashback sequence in "Vigilante". One of Ishmael's men uses one in "The Sin-Eater". Konstantin Kovar (Dolph Lundgren) uses it in "Kapiushon".
Zoraki 925
A Zoraki 925 is used by an armed Bratok in "Fight Fire with Fire".
Revolvers
Smith & Wesson Model 19
A Smith & Wesson Model 19 is used by Lt. Conaghan (Ryan Williams) as his off-duty sidearm in "Legacy". It's seen in"So It Begins" by an erratic bystander and in "Invasion" in a hallucination by an armed mugger.
Ruger GP100
Prometheus aka Adrian Chase (Josh Segarra) used a Ruger GP100 with a 4.20" barrel to commit suicide and seemingly doom all of Oliver's allies to an uncertain death at the end of "Lian Yu", a haunting mirror to how Robert Queen (Jamey Sheridan) used the same type of revolver to kill himself in order to save Oliver's life.
Submachine Guns
Beretta PM12
A Beretta PM12 is used in "Bratva" by one of Hideo Yamane's men during a meet in Starling City. In "Fight fire with Fire", a Bratok on guard duty uses it without a stock seen.
Cobray M11/9
The Cobray M11/9 is seen with armed criminals in the season.
Heckler & Koch MP5A3
Heckler & Koch MP5A3s are used by the SCPD ESU team as their main submachine gun. Some of the armed bodyguards of AmerTek CEO Janet Carroll are armed with them in "The Recruits". Some of Tobias Church's soldiers use them in "Penance". Several are seen in Oliver's Arrow hideout in the season. Some of the Helix members in the raid on the ARGUS black site use them in "Dangerous Liaisons".
Heckler & Koch MP5K
The Heckler & Koch MP5K is seen with Vigilante as his main submachine gun.
Heckler & Koch MP5SD
Several Heckler & Koch MP5SDs are seen in a gun rack in Oliver's Arrow hideout in "Legacy". There aren't enough details to determine what type of submachine gun it is.
Heckler & Koch MP7A1
Several Heckler & Koch MP7A1s are seen with the majority of Tobias Church's soldiers, first seen in "Legacy". One of CEO Caroll's bodyguards is seen with it in "The Recruits".
IMI Mini-Uzi
An IMI Mini-Uzi is used briefly by Rene while not using his Wild Dog costume in "Disbanded".
Intratec TEC-9
Intratec TEC-9s are seen with some armed criminals in the season.
Kimel AP-9
A Kimel AP-9 is seen with a mob soldier near the end of "Legacy".
Steyr SPP
A Steyr SPP is used by Church's masked assassin in a hit on Oliver in the middle of "Human Target". Liza Warner uses it in "The Sin-Eater" after breaking out of a DOC bus.
Assault Rifles
AK-47
An AK-47 is seen with one of Kovar's Bratoks in "Missing".
AKS-47
A few AKS-47s are seen with Anatoli's Bratoks in "Disbanded". Kovar's Bratoks use them in "Lian Yu".
AKMS
An AKMS is used by a Russian mafia Bratok in "Second Chances". Kovar's Bratoks use them in "Kapiushon". Oliver uses it after he disarm one of Kovar's Bratoks in "Lian Yu".
AK-74M
AK-74Ms are used by Anatoly Knyazev's Solntsevskaya Bratva faction, first seen in "Bratva". One of Kovar's Bratoks uses it in "Missing".
AKS-74U
AKS-74Us are seen in "Bratva" with Lev (Sasha Piltsin) and his men. One appears to be used in "Kapiushon" by one of Kovar's Bratok, stock folded.
Colt CAR-15
The Colt CAR-15 is seen with Eric Dunn (Toby Levins) and his crew throughout "Vigilante". Rene and Rory use them while posing as Dunn's crew.
Colt M4A1
The Colt M4A1 is seen with American military and law enforcement personnel in the season. Some are seen in the Arrow's team hideout throughout the season also. Walker's rogue Rangers use them in Russia in "Bratva". It's seen in an arms stash in "Spectre of the Gun". Some of Derek Sampson's goons use them in "Honor Thy Father".
FN SCAR-L
A FN SCAR-L is used by Vigilante as his main assault rifle.
Norinco Type 56
An Norinco Type 56 is seen in an arms stash in "Spectre of the Gun".
Norinco Type 56-1
Several Norinco Type 56-1s are used in "Disbanded" by Anatoli's Bratoks.
SIG SG 552
SIG SG 552s are used by armed mercenaries and Helix members in "Dangerous Liaisons".
Zastava M70
A Zastava M70 used by spree shooter in "Spectre of the Gun".
Shotguns
Remington 870
A Remington 870 with a short barrel is used by a Bertenelli mob soldier, turned against his boss, at the end of "Legacy". Derek Sampson (Cody Runnels) briefly uses it to take on Oliver in "Honor Thy Father".
Sniper Rifles
Nemesis Arms Vanquish
A Nemesis Arms Vanquish is used, but not fired by Vigilante in "Fight Fire with Fire".
Suppressed Bolt-Action Rifle
A suppressed bolt-action rifle with integral suppressor is used by Rene in "Penance". They're not enough details to determine what the rifle is since the scene is shot at night.
Machine Guns
Phalanx CIWS
Dual Phalanx CIWS guns are mounted inside an ARGUS black site in "Dangerous Liaisons".
Rocket Launchers
AT4
An AT4 is seen taken by Church's soldiers from police custody in "Penance", which is later used in "Human Target".
FIM-43 Redeye
A FIM-43 Redeye is seen at the end of "The Recruits" in an arms cache. It's later recovered from police custody in "Penance".
Grenades
M67 Frag Grenade
Dual M67s are used by one of Tobias Church's soldiers in "Penance".
Grenade Launchers
FN Mk 13 Mod 0
The FN Mk 13 Mod 0 is seen mounted on the SCAR-L Vigilante uses in "Vigilante".
The Oneida Eagle Kestrel is used by Oliver once again in the season. An alternate version of the Green Arrow via Diggle briefly uses it in a hallucination in "Invasion".
Recurve Bow
Thea returns as Speedy when she uses her recurve bow in "Legacy".
Evelyn Sharp aka Artemis uses a green recurve bow at her, first seen in "So It Begins".
Prometheus also uses his own recurve bow.
Talia Al Ghul (Lexa Doig) uses it during her time in Russia.
Bow
Oliver uses a bow given to her by Talia during his time in Russia.
Custom Pistol
Diggle's custom pistol is used once again in Season 5 after he takes on the mantle of Spartan again after escaping from US Army MP custody.
Gun Store
A variety of small arms are seen on display at the gun store where Diggle, Rene and Curtis run a sting op in "Vigilante".