The M24 is a bolt-action sniper rifle currently in service with the United States Army, Police, and the Israeli Defense Force. The M24 is basically a redeisgned Remington 700 similar to the M40. Each of the tree variants of the M24 fires a different cartidge. The M24A1 fired the .300 Winchester Magnum, the A2 fired the 7.62x51mm, and the A3 fires the .338 Lapua Magnum.
The M24 has appeared in numerous video games, such as Battlefield: Bad Company 2 and Call of Duty 4: Modern Warfare. In Call of Duty 4, it is called the R700, or Remington 700. The model in game is the M24A2, due to it's usage of 7.62x51 NATO rounds.