Also asked, what gun do you unlock at 155?
A new reward in season 4 of Call of Duty: Modern Warfare, the Sandbar blueprint can only be unlocked by reaching level 155 (Five Star General) in season 4. Once you do so, you will receive the Sandbar blueprint as a reward.
Subsequently, question is, what blueprint do you get for 155 Season 2? It's going to take a bit of grinding, but if you reach level 155 in Modern Warfare Season 2, you'll eventually unlock the Code Breaker blueprint. Once you have, the special-edition FR 5.56 will be yours.
Likewise, what is the highest level you can get in modern warfare?
The technical max level in Modern Warfare multiplayer is 55. It takes 960,000 XP to reach level 55. But once you hit this level, you won't have the option to prestige. Instead, you can just keep playing and level up your Officer Rank.
What do you get for hitting level 155?
CharlieIntel on Twitter: "*Reach end of Level 155. The weapon blue print will be awarded when Season 0 ends."