MSR

The MSR is a high damage bolt-action sniper rifle that appears in Call of Duty: Modern Warfare 3.

Call of Duty: Modern Warfare 3
"A master of the one-shot kill, the bolt-action MSR deals exceptionally high damage from exceptionally far distances. Paced shooting and an even-tempered approach ensures any MSR sharpshooter success no matter the range."

- DewXP description

Campaign
The MSR appears in the campaign level "Iron Lady", where it is useful for picking off enemies at range in the ground-based section of the mission.

Multiplayer
The MSR is unlocked at Level 66 in multiplayer. It is the very last sniper rifle to be unlocked. It is nearly identical to the L118A, but has a much faster bolt pull, and features a different scope. Its reload is fairly fast as well.

As with all sniper rifles, Quickdraw is a great perk to use to speed up its lethargic aim time. Sleight of Hand Pro can also be useful, as one can quickly switch to another weapon in a close quarters pinch, and the faster reload can save one's life when faced with many enemies at once.

Survival Mode
The MSR costs $2000 to buy from the Weapons Armory. It is unlocked at level 7.

Weapon Attachments

 * ACOG Scope - Unlocked at weapon level 2.
 * Silencer - Unlocked at weapon level 5.
 * Heartbeat Sensor - Unlocked at weapon level 13.
 * Extended Mags - Unlocked at weapon level 15.
 * Thermal Scope - Unlocked at weapon level 19.
 * Variable Zoom - Unlocked at weapon level 22.

Proficiency

 * Kick - Unlocked at weapon level 4.
 * Impact - Unlocked at weapon level 10.
 * Attachments - Unlocked at weapon level 14.
 * Focus - Unlocked at weapon level 18.
 * Speed - Unlocked at weapon level 24.
 * Stability - Unlocked at weapon level 28.

Trivia

 * The MSR has the Remington logo on the left side of the gun, similar to the ACR 6.8 and the RSASS.
 * In addition, it has a Leupold logo visible on the scope's elevation adjuster.
 * In the Dew XP promotion it says Price's main weapons are the MSR and CM901 despite never using them in game.