Metal Gear Solid 4: Guns of the Patriots

Heckler & Koch XM8

The Heckler & Koch XM8 is used by the Rat Patrol and other US troops in game. It can be found and used by the player in a secret area in Act 2. It comes with a built in scope and can be equipped with an XM320 grenade launcher.

Sig Sauer GSR

The Sig Sauer GSR is the standard handgun of the PMCs in game. It can be found and used by the player in Act 1.

M1911A1

The Colt M1911A1 is referred to as the "Operator" in game and is Solid Snake's handgun of choice. It is given to him along with the Ruger Mk. 22 by Otacon early in Act 1. It can be equipped with a suppressor and a flashlight.

Heckler & Koch MP7

The Heckler & Koch MP7A1 is used by several of the PMC operatives in game. It can be first found and used by the player in Act 2 and can be equipped with a reflex sight.

Heckler & Koch MP5SD

The Heckler & Koch MP5SD is in the game, it can be purchased from Drebin and equipped with scopes.

Heckler & Koch HK21E

The Heckler & Koch HK21E is seen in the hands of rebel forces in the Middle East section of the game (Act 1). It can also be purchased via Drebin like most other firearms.

Heckler & Koch G3A3

The Heckler & Koch G3A3 is seen in the hands of the rebel forces in the South America section of the game (Act 2). It can also be purchased via Drebin like most other firearms in the game.

FN-FAL

The FN-FAL is seen in the hands of the rebel forces in the Eastern Europe section of the game (Act 3). It can be purchased from Drebin like most other firearms in the game.

FN SCAR-H

The FN SCAR-H, referred to as the Mk. 17, is the standard assault rifle used by the PMC operatives in game. It can be found fairly early on in Act 1, and can be upgraded with scopes, suppressor, laser sights, flashlight and foregrips.

FN P90

The FN P90 is used by the FROGs and Laughing Octopus in game. It can be equipped with a suppressor, laser sight, and flashlight.

AK-102

The AK-102 is used by the rebel forces in the Middle East section (Act 1). It can be equipped with a GP-30 grenade launcher.

AN-94

The AN-94 can be found in a shack at the beginning of Act 2. It can be equipped with a GP-30 grenade launcher.

M4A1

The M4A1 Carbine is Solid Snake's assault rifle of choice and is given to him early in Act 1 by Drebin. It can be upgraded with everything.

Desert Eagle

The Desert Eagle is used by Meryl in the game. It can be purchased from Drebin.

M60E4

The M60E4 is used by the PMC operatives in game. It can be equipped with scopes, foregrips, laser sight, and flashlight.

M14 EBR

The M14 EBR is the SOCOM variant of the M14 Rifle. It is used by the PMC operatives in game and can be purchased from Drebin. It can be equipped with a suppressor, laser sight, and flashlight.

DSR-1

The DSR-1 can be purchased from Drebin.

Mosin Nagant

A modified Mosin Nagant rifle can be purchased from Drebin in game. It is the same rifle used by The End in MGS3 and fires tranquilizer rounds.

MAC-10

The MAC-10 can be purchased from Drebin or found in Act 2. It can be equipped with a suppressor.

Skorpion Vz 83

The Skorpion SA(Vz 83 model) is used by the rebels in the Eastern Europe section of the game (Act 3) and is given to Solid Snake by Big Mama in Act 3. It has a laser dot sight attached to it.

Remington R870 Custom

The Remington 870 can be purchased from Drebin and can be equipped with a reflex sight.

Saiga 12

The Saiga 12 can be purchased from Drebin.

Ruger Mk. II

A suppressed Ruger Mk. II that fires tranquilizer rounds is given to Solid Snake by Otacon early in the game.

RPG-7

The RPG-7 is used by the rebels in the Middle East section (Act 1). It can be found in Act 1.

M320 grenade launcher

The Heckler & Koch XM320 grenade launcher can be purchased from Drebin and attached to the M4A1 Carbine and XM8 rifle.

MGL-140

The Milkor M32 MGL appears as the "MGL-140," it is used by Raging Raven and is acquired by Solid Snake upon defeating her.