Agent Romanoff/Black Widow (Scarlett Johansson) carries a pair of Glock 26s as her sidearms in dual Blackhawk Serpa CQC thigh holsters, replacing the stainless Walther PPK/S previously carried in Iron Man 2.
Black Widow with her Glock as the Avengers assemble.
Glock 19
S.H.I.E.L.D. agents including Maria Hill (Cobie Smulders) carry the Glock 19 as their sidearm. At least one or two mercenaries disguised as SHIELD agents carry Glock 19s as well. NYPD officers also are seen with the Glock 19 pistols including Officer Saunders (Enver Gjokaj) and Sgt. Silva (Robert Clohessy).
Glock 19 (3rd Generation) - 9x19mm Parabellum
Agent Hill's screen-used stunt (dense rubber) Glock 19 from The Avengers. Image from Prop Store of London.
Opposite side view of the stunt Glock 19 from The Avengers. Image from Prop Store of London.
SHIELD Agent Hill (Cobie Smulders) draws her Glock 19 as Loki makes his getaway from the SHIELD base.
SHIELD Agent Maria Hill fires her Glock 19 at Loki and a brainwashed Clint Barton (Jeremy Renner).
The operatives in the middle appear to carry Glock 19s in their drop leg holsters on board the Helicarrier as noted by the short boxy grip. The mercenary on the left has a Glock 17 in his holster.
Agent Hill shoots down several mercenaries disguised as SHIELD agents with her Glock 19.
Agent Hill open fires with her Glock 19.
Agent Hill and Director Fury hold their pistols while defending the bridge of the helicarrier from the waves of mercenaries.
NYPD officers firing their Glock 19s at the incoming waves of Chitauri from behind their squad cars.
NYPD Officer Saunders (Enver Gjokaj) and Sgt. Silva (Robert Clohessy) both carry Glock 19s during the battle of New York.
Sgt. Silva (Robert Clohessy) has his Glock drawn while talking to Captain America.
Glock 17
A Glock 17 is seen being loaded up by a mercenary disguised as a SHIELD agent as Hawkeye and his men are about to infiltrate the SHIELD Helicarrier.
Glock 17 - 9x19mm.
A mercenary loading his Glock 17 on board a Quinjet.
Promotional image:The P30 is visible in Hawkeye's holster.
Agent Barton/Hawkeye (Jeremy Renner) puts his P30 back in his holster after being turned by Loki.
Agent Barton/Hawkeye (Jeremy Renner) fires his P30 at Agent Hill.
Agent Barton/Hawkeye (Jeremy Renner) fires his P30 at Agent Hill.
A possessed Hawkeye fires his H&K P30.
Smith & Wesson M&P
SHIELD Director Nick Fury (Samuel L. Jackson) can be seen carrying the Smith & Wesson M&P as his sidearm. Interestingly, S.H.I.E.L.D. agents in Marvel's Agents of S.H.I.E.L.D. are equipped with the M&P as their standard pistol instead of the Glock 17 featured prominently in the hands of S.H.I.E.L.D. agents in those MCU films. As stated previously, the Smith & Wesson M&P appears to have phased out the 3rd generation Glock 17s after the events of Avengers, however some Glocks are still carried by veteran agents afterwards.
Smith & Wesson M&P - 9x19mm Parabellum
A publicity still of SHIELD Director Nick Fury (Samuel L. Jackson) with a pair of Smith & Wesson M&P handguns. In the film, Fury carries only one M&P as his sidearm.
A production image of Nick Fury firing his M&P.
Nick Fury fires at Loki with his M&P from a S.H.I.E.L.D. helicopter.
Nick Fury indexes his M&P9 sidearm in its holster. In the background, you can see Agent Romanoff do the same with her Glock 26.
Nick Fury holds his pistol on the bridge of the helicarrier.
Nick Fury opens fire with his weapon.
Director Fury with the M&P while defending the bridge of the helicarrier.
Director Fury and Agent Hill hold their pistols while defending the bridge of the helicarrier.
Director Fury holds his M&P9 while on the deck of the helicarrier. Note the trigger discipline.
One of the men interrogating Black Widow has a Makarov PM tucked in his waistband.
Makarov PM - 9x18mm Makarov
The man on the left has a Makarov PM in his waistband.
Submachine Guns
KRISS Vector
The KRISS Vector is seen being used by one of the mercenaries accompanying Hawkeye as they board the ship. It is seen again later as the mercenary shoots at Captain America.
Kriss Vector with TDI vertical foregrip and EOTech XPS2-0
Promotional image, the soldier on the right has a Vector.
The mercenary to left carries a KRISS Vector fitted with an Aimpoint sight and what appears to be a tactical flashlight.
On the far left, the operative carries a KRISS Vector.
The operative uses the KRISS Vector to engage Captain America.
Heckler & Koch UMP
One of the mercenaries accompanying Hawkeye carries a Heckler & Koch UMP.
Heckler & Koch UMP45 - .45 ACP
The mercenary in the center has a UMP. Only the stock is visible.
One of Loki's mercenaries uses a Saiga 12K during the Helicarrier assault.
Saiga-12K - 12 gauge
The man directly behind Hawkeye has a Saiga 12K. The barrel appears to have been cut down.
A mercenary in Loki's hideout with his Saiga 12K slung.
Rifles
M4A1 Carbine
Members of the New York National Guard are seen with M4A1 Carbines during the battle on the streets of Manhattan. SHIELD agents carry M4A1 equipped with EOtech MPO holosights while escorting a restrained Loki.
Colt M4A1 Carbine with M68 Aimpoint reflex optic and Knight's Armament RAS railed handguard and vertical forward grip - 5.56x45mm
A production image of M4A1-equipped SHIELD agents escort Loki (Tom Hiddleston).
Another shot of the SHIELD agents with Loki.
Several SHIELD agents open fire on Loki moments before Loki kills them with several throwing knives.
A close up of the same shot, showing the M4A1's accessories and receiver.
A rack of M4A1 Carbines fitted with EOtech MPO holosights, Surefire M82 tactical rails, and OTAL laser sights in the SHIELD helicarrier.
National Guard soldiers aim their M4A1s while a few of them cover fleeing civilians.
A soldier opens fire with his M4A1 fitted with an Trijicon ACOG.
Noveske N4 Diplomat
Mercenaries disguised as SHIELD agents carry Noveske N4 Diplomat carbines during the SHIELD Helicarrier raid. Steve Rogers/Captain America (Chris Evans) is briefly seen firing a Noveske N4 Diplomat taken from one of the mercenaries disguised as a SHIELD agent. The rifle appears to be fitted with a Aimpoint CompM4 red dot scope, Niveske muzzle flash hider, Vltor VIS upper, Vltor IMOD stock, Troy BUIS and Magpul P-Mag.
Noveske Rifleworks Diplomat with Aimpoint CompM4 red dot scope and Surefire M900 weapon-light fore-grip - 5.56x45mm
A mercenary with his Noveske Rifleworks Diplomat fitted with a Vltor VIS upper before engaging Captain America.
Steve Rogers/Captain America fires the Diplomat at a mercenary disguised as a SHIELD agent. The Vltor VIS logo can be seen on the forward assist/case deflector.
During the interrogation of Black Widow at the beginning of the movie, crates full of AKM rifles are briefly seen. Mercenaries disguised as SHIELD agents can be seen carrying accessorized AKM rifles.
AKM - 7.62x39mm
Crates of AKM's are stacked behind where Agent Romanov/Black Widow is interrogated.
Photoshopped AKM fitted with Tapco Intrafuse and T6 furniture sets and an M4 buttstock and Stock Adapter, to look like the weapon in Modern Warfare 2 - 7.62x39mm
Promotional image: the mercenary on the left is carrying a tactical AKM fitted with a Aimpoint CompM2 CCO.
The operative on the right carries the tricked out AKM with what appears to be a buffer tube collapsible stock.
General Dynamics GAU-17/A, US Air Force version of the M134 Minigun - 7.62x51mm NATO
A SHIELD Quinjet flown by Black Widow in Stuttgart aiming a GAU-17 at Loki's position.
The GAU-17 is seen being deployed from Black Widow's Quinjet.
M249 SAW Para
One of Loki's mercenaries can be briefly seen handling an M249 SAW Para.
M249 SAW paratrooper version - 5.56x45mm
The man behind Hawkeye has an M249 Para.
Other
AirTronic RPG-7
SHIELD Director Nick Fury (Samuel L. Jackson) can be seen using an AirTronic RPG-7 launcher (a modernized US manufactured version of the RPG-7) to fire a custom warhead at a plane launching off the SHIELD helicarrier. A mercenary patrolling in Loki's underground hideout is briefly seen with one.
Airtronic RPG-7 - 40mm
Nick Fury aiming the AirTronic RPG-7 with a custom warhead.
What appears to be an MM1 grenade launcher is used by a member of the tactical team sent on a capture mission.
MM1 grenade launcher - 40mm.
What appears to be an MM1 grenade launcher is used by a member of the tactical team sent on a capture mission (this screenshot was taken from the teaser seen at the end of Captain America: The First Avenger and was not clearly seen in the final film).
On the left, the MM1 aimed at the house in front (Screenshot from the trailer).
General Dynamics GAU-22/A
The SHIELD fighter plane resembling a Lockheed Martin F-35B jet is seen engaging the Hulk with what appears to be a pair of GAU-22/A 25mm guns. This configuration is very similar to the F-35B seen in the film Live Free or Die Hard. In reality, the F-35B is only outfitted with a single external gunpod. The SHIELD jet fires its twin cannons before the Hulk jumps onto the body of the jet.
General Dynamics GAU-22/A - 25mm
The SHIELD fighter plane resembling a Lockheed Martin F-35B jet is seen engaging the Hulk with what appears to be a pair of GAU-22/A 25mm guns, which appear to be firing out of the air intakes for some reason.
"ALS" Flashbang Grenade
What appears to be a flashbang grenade is used to breach in the bridge of the SHIELD helicarrier during Hawkeye's assault. The grenade is similar to the "ALS" prop grenade seen in such series as The Unit.
A grenade rolling across the floor, moments before it explodes.