Syphon Filter 3

The Mars is not russian PP-90. It's an american Ares FMG, designed by Eugen Stoner. Because it's name Mars=Ares (antic god of war), and because it was used in Washington mission by goverment agents.

Kind of hard to tell when there's no screenshots, but the name and where it's used in the game don't really prove what type of gun they based it on. Evil Tim (talk) 09:42, 22 September 2012 (EDT)

The below weapons were used in Syphon Filter 3.

Assault rifles

Steyr AUG

Lian Xing can procure this weapon during Kabul, Afghanistan and when she captures Elsa Weissenger. It has a fictional 'X-ray' scope that can apparently cut into walls and let users view any hidden targets.

Heckler and Koch G11

The G11 is available in the last pack of missions when Gabe hunts down Mara Aramov.

"K3G4"

An unknown weapon named the 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, they dropped their flak jackets upon death, so it was possible to kill them with this weapon AND still replenish one's armour.

M-16A1

The M-16 returns from previous games, and is highly accurate.

"PK102"

Another unidentified weapon apparently described as a 'Kalashnikov' derivative.

Submachine guns

Heckler and Koch MP5

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.

Spyder Skorpion vz 61

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

Sniper rifles

AS50

A sniper rifle can be procured during most missions. Seems to be an AS50 with EO tech variable zoom scope.

This is actually a SIG SG 550. -SeptemberJack (talk) 19:44, 25 May 2017 (EDT)

SIG SG 550 SR - 5.56x45mm

Shotguns

Daewoo USAS-12

The USAS 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.

Heckler & Koch CAWS (Close Assault Weapons System)

Franchi SPAS-15

The SPAS-15 can be found in the Waterfront. Bizarrely loaded with 'fragmentation' rounds that explode on contact, making an already overpowered weapon even more damaging.

Mossberg 500 Compact Cruiser

A generic 'shotgun' can be used.

Pistols

Glock 17

The player begins most missions with this weapon.

IMI Mark XIX Desert Eagle

The Desert Eagle, or the 'Falcon', its in-game moniker, is a hand cannon that can be found in Hotel Fukushima.

Colt M1911A1

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

Machine pistols

Magpul Folding Machine Gun

Seen in the hands of Aramov's goons.

This is an ARES FMG, hence the name. --Funkychinaman (talk) 07:06, 23 May 2017 (EDT)

Glock 18

Fully automatic machine pistol used by Aramov's thugs in Senate Building and DC Subway.

All images of the G-18 in the trilogy erroneously show the pistol with its slide locked back, indicating that it is empty. This may have been done for aesthetic reasons. In real life, the Glock 18 does not have any significant design differences (aside from a cut in the slide and a select-fire switch) from the Glock 17, which serves as the direct inspiration for Gabe's most well-known weapon, the Silenced 9mm, so the gun was probably intentionally displayed like this to avoid confusion.

Explosives

Incendiary grenade

M7 CS gas 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.

Launchers

Tru Flite 37mm Super Long Range Gas Gun

Referred to as an 'M-79' in-game, this weapon 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.