Crysis

SCAR

Although called the SCAR in-game, the weapon used by Marines and the player is actually a Heckler & Koch XM8. The assault rifle can be customised in-game. You can attach either a reflex sight, assault scope or a sniper scope for sights. You can also attach either a light or rifle Laser Aiming Module for targeting purposes. Another nifty feature is the ability to attach either a sleeping dart launcher or a grenade launcher. Finally, you can suppress the weapon itself.

FY-71

The FY-71 is the main weapon for the North Korean soldiers in-game. It is actually based on the AK-74M. Like the SCAR, it features the ability to be customised. For scopes and sights, you can either attach a Reflex Sight, an Assault Scope or a Sniper Scope. For lights and lasers, you can attach a rifle flashlight or a Laser Aiming Module. In addition to that, you can attach a grenade launcher or tranquiliser attachment. Then, there is the silencer. One very useful thing about the FY-71 is that you can choose between normal ammo or inciendary ammo, once you get it.

MPX8

Closely resembles an MP7A1

DSG1

As the name implies, it's based on the DSR-1.

SOCOM

Modeled on the H&K USP