Grip

The foregrip is an attachment to weapons in Call of Duty 4: Modern Warfare that will reduce weapon recoil. The fore grip attachment is available for light machine guns and shotguns. It is unlocked when a player achieves 75 kills with a light machine gun, and 50 kills with a shotgun. Using the fore grip attachment will replace a player's tier one perk.

Call of Duty: World at War
The grip attachment only available for the two shotguns, the Double-Barreled Shotgun and Trenchgun. They increases weapon accuracy just as in Call of Duty 4: Modern Warfare. It also replaces the player's tier one perk.

Trivia

 * The M4A1 Carbine comes equipped with a fore grip but this does not count as an attachment
 * In Call of Duty: World at War, the two shotguns (Double-Barreled Shotgun and M1897 Trenchgun) have grips, but they are more of a "straight handle" grip
 * A Sawn-Off Double Barreled Shotgun w/grip is located just before entering the Asylum in the mission Ring of Steel