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The following weapons appear in the video game Syphon Filter 3:

The player begins most missions with the Glock 17, mounted with a silencer.

The Desert Eagle, or the 'Falcon', its in-game moniker, is a hand cannon that can be found in Hotel Fukushima. The weapon is used by Shi-Hao's bodyguards, leader of a rogue Chinese army revolutionary group, and some of Mara Aramov's assassins during the DC courtroom battle.

The Colt M1911A1, another heavy-hitting pistol, appears in the game.

The Glock 18 is a fully automatic machine pistol used by Aramov's thugs in Senate Building and DC Subway.

Maggie Powers and Gabe Logan are seen with low-detail handguns during the attempt to scuttle the Lorelei. Although judging from the shape, it appears to be based on the a Glock pistol.

The ARES FMG is seen in the hands of Aramov's goons.

Following a convention from Syphon Filter 2, the "HK5" is now a Heckler & Koch MP5SD rather than an MP5K as it was in the first game.

The Skorpion can be used during the scuttling of the Lorelei.

The USAS-12 can be used in the game; it firstly appears in 'C5 Galaxy' when Gabe takes matters into his own hands and tries to exact revenge on behalf of Ellis during Erich Rhoemer's escape from the Costa Rican plantation. He ends up doing a similar thing to what he did to Jason Chance in the previous game: use an automatic shotgun to drive Rhoemer out from the cargo bay. The weapon can be acquired again in 'Aztec Ruins' but due to the presence of the G11 and various other rifles, it is somewhat less useful, but still invaluable thanks to the ruins' abundance of tight corridors.

The CAWS.

The SPAS-15 can be found in the Hotel Fukushima if the purple T-shirt-wearing character survives, and is also seen in the Waterfront. Bizarrely loaded with 'fragmentation' rounds that explode on contact. This is arguably the most devastating weapon due to the explosive rounds combined with automatic firing speed, making an already overpowered weapon even more damaging.

The weapon is also available in multiplayer, and the idea of an automatic mini-grenade launcher with pin-point accuracy that can kill you with a single hit is as overpowered as it sounds.

A generic 'shotgun' can be used. It is similar to the Mossberg 590 Compact Cruiser.

Lian Xing can procure the Steyr AUG carbine during Kabul, Afghanistan and when she captures Elsa Weissenger in Australia. Another one can be found in the final level, when Gabe confronts Aramov in the subway, and is needed to safely neutralize her without harming her hostage. The weapon can only fire in single shots, although a real version of this firearm has a fully automatic firing option as well. The weapon is called the "AU300".

The telescopic x1.5 Swarovski scope has been depicted as having a fictional "X-ray" function (it says that its replaced with a Russian scope, except that a portable scope with actual X-ray capabilities is non-existent and would highly dangerous to everyone involved due to bombarding anything it sights through with lethal amounts of radiation, not to mention bulky.), that can see through certain surfaces. Its also equipped with armor-piercing ammunition, which allows it to dispatch targets through walls.

The G11 is available in the last pack of missions when Gabe hunts down Mara Aramov. It's incorrectly classed as a sniper rifle likely due to its custom scope view, but still handles like an assault rifle due to its blisteringly high rate of fire.

An unknown weapon named "K3G4" is available during certain missions. Though considered a 'rifle', it is held one-handed. It fires so-called 'Teflon' rounds that penetrate armoured enemies, permitting their deaths without headshots. Bizarrely, enemies drop their flak jackets upon death, so it is possible to kill them with this weapon AND still replenish one's armour.

The M16A2 is seen, replacing the A1 model seen in the previous games. The world model strangely appears without the stock or buffer tube modeled (which would in reality render the weapon inoperable given that there's no space whatsoever for the bolt carrier to slide back into and, thus, it's essentially impossible to load a round into the chamber).

Additionally, the weapon still fires in both bursts and full-auto, the latter of which the A2 variant is incapable of doing.

What appears to be the AK-102, judging from the name and locale it is used, appears in the game. Unlike its previous incarnation, the gun now appears with all wooden accessories.

A SIG SG 550 is depicted as the game's sniper rifle.

The 'Nightvision rifle' seems to resemble a Dragunov. It is equipped with some kind of aiming device meant to highlight targets in low-light settings.

C4 charges once again make an appearance.

Despite being, in real life, an explosive grenade, the M67 appears as an incendiary grenade.

A grenade containing Soman nerve gas (a chemical similar to, but more toxic than, Sarin, also known as GD) can be found in stealth missions. It appears to essentially be a truncated M7 CS gas grenade. It is integral to taking enemies down without sounding the alarm.

Incorrectly called the 'M-79' in-game (in reference to the M79 Grenade Launcher), the Tru Flite 37mm Super Long Range Gas Gun is, in reality, unable to launch high-explosive grenades. The model seems to be similar to that used in previous games.

Miscellaneous

Crossbow

An unidentified crossbow can be used during the Pugari missions and in Paradise Ridge. Firing knockout rounds, it generally renders targets unconscious unless the player aims for one's head. The weapon has a red dot sight and a maximum capacity of five rounds.

Taser

A general-purpose, non-descript taser is a starting weapon in every mission. The signature weapon of the series, it was possible to set enemies alight if sustained stunning was used. This convention carried over to most games in the franchise, but it was not possible to cause targets to be set aflame in certain circumstances. In the PS2 and Vita versions of Syphon Filter: Dark Mirror, you can't burn enemies with the Taser but in the PSP version, you can. In Syphon Filter: Logan's Shadow, you can't burn enemies with it. This is a version of the early Taser prop seen in movies such as The Perfect Weapon and TV shows such as The X-Files.

KA-BAR Combat Knife

The combat blade from Syphon Filter 2 returns.

Automated sentry

Rhoemer's plantation is defended by numerous turrets which the player must destroy to advance.