SCAR-H

The FN SCAR-H, or Mk. 17 Mod 0, is a modular, modern day battle rifle made by FNH. The L-variant of this weapon was first issued to US forces in April of 2009, with a battalion of the US 75th Rangers being the first large unit deployed with the FN SCAR. It was designed at the request of SOCOM for a multi-caliber special-forces rifle capable of marksman and CQB conversions. The SCAR-H is the battle rifle version, firing the more powerful 7.62x51mm round, making it one of the first original battle rifles since the 1950s. It has competed with the XM8 and the HK416 for general adoption by the US army, though none of the rifles were selected to replace the M4. Although current U.S. special forces mainly Army Rangers, Delta Operators, and Navy SEALs are field testing the weapon in Iraq and Afghanistan.

Call of Duty: Modern Warfare 2
Not much is known about the FN SCAR, and it is unknown if it will make an appearance in the singleplayer part of the game. It has been identified however, as the SCAR-H variant in the CTF multiplayer trailer.

Trivia

 * On the side of the rifle, it says "Infinity Ward USA" on the engraving.