Fire mode

Fire mode is a feature for many weapons in the game.

Details
On weapons that support fire mode change, it can be adjusted by pressing the left mouse button while on the inventory menu. There are a few types of fire mode:
 * 1) Full-auto is usually the default fire mode for weapons that supports it. This mode allows for liberal firing of the weapon but tends to be rather inaccurate during sustained fire. Available for all primary weapons except for sniper rifles, rocket launchers, and the Remington 870.
 * 2) Burst-fire allows for firing weapons in 3-round bursts, which might save ammo in some cases while still allowing for a sustained fire when the player repeatedly presses the left mouse button. Available for certain assault rifles and SMGs as well as the Beretta 93R pistol.
 * 3) Single-shot locks the weapon's firing to semi-auto (or pump-action in the case of Remington 870) and is the most ammo-conserving fire mode of all. However, it can be difficult to perform sustained fire without a fast trigger finger. Found in most primary and secondary weapons.
 * 4) 40mm grenade launcher allows for firing underbarrel grenades which deals a significant amount of damage and allows for killing multiple enemies within the blast radius. Available for most assault rifles except for the AK-47.