Syphon Filter

Assault rifles

M-16

The M-16 can be used during the Washington assault.

'K3G4'

A fictional weapon which seems to be supposed to be some kind of one-handed AK pistol without a handguard, but is still classified as a rifle. Its description repeats the media myth of the "teflon-coated bullet:" while heavy AP rounds do have Teflon coatings to reduce barrel wear, the coating is mostly removed through contact with the weapon's rifling and has no effect on its penetration. Despite its armour-piercing performance in-game, it does not stop Gabe from recovering completely intact armour pickups.

Submachine guns

Izhmash PP-19 Bizon

The Izhmash PP-19 Bizon can be found in the PHARCOM warehouses. It has an incorrect 66-round magazine: the maximum possible for a real Bizon is 64.

PP-19 Bizon-2 with side-folding stock - 9x18mm Makarov

The Agency is apparently unaware of the term "submachine gun."

Heckler & Koch MP5K

A Heckler & Koch MP5K, referred to as the "HK5," is found in the PHARCOM expo centre.

Shotguns

12 gauge choke shotgun

A 12 gauge choke shotgun can be used during most missions.

Let us not even begin to wonder how they caused collateral damage on a firing range.

Combat shotgun

This is only found in the PHARCOM expo centre.

Sniper rifles

SIG SG 550 SR

A sniper rifle is one of the starting weapons in every mission. While it does not look tremendously like one, the model used in the second game implies it is supposed to be a SIG SG 550 SR.

SIG SG 550 SR - 5.56x45mm

SVD Dragunov

The SVD Dragunov is functionally almost exactly the same as the standard sniper rifle, but has a night vision scope.

SVD Dragunov sniper rifle - 7.62x54mm R

Note there is no such thing as an "SVDN2" night vision scope: this name is applied to rifles which are modified to use the NSPUM (1PN58) night vision scope. The model is shown with a standard PSO-1 scope, and also lacks the suppressor it is claimed to have in the description.

Pistols

Glock 17

A silenced Glock 17 is the second default weapon for each mission. The suppressor can never be removed.

Colt .45

The M1911A1 can be found in Washington Park and in Rhoemer's cathedrals.

Machine pistols

Glock 18

The Glock 18 can be used in Rhoemer's cathedral and is held by Edward Benton, an Agency turncoat attempting to kill Gabe.

Launchers

Tru Flite 37mm Super Long Range Gas Gun

The weapon called the "M79" in-game is actually a Tru Flite 37mm Super Long Range Gas Gun incorrectly shown as able to launch high-explosive grenades. Erich Rhoemer uses it in the last boss fight, but the player can never acquire it since the game is scripted to finish when he is killed. In circumstances when the weapon is player-controlled, it is hidden very well in certain places.

Tru Flite 37mm Super Long Range Gas Gun - 37mm

Explosives

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 is integral to taking enemies down without sounding the alarm. The weapon is also required to kill Rhoemer.

M67 Hand Grenade

The standard grenade which can be found in most missions: it explodes 3 seconds after throwing it.

The game appears incredibly confused about what the grenade is: ammonium perchlorate is an oxidiser normally used in rocket fuel, and the only type of grenades that use it are flashbangs, where it is used to generate a rapid reaction from aluminium or magnesium.