Leupold Mark 4

Summary
It's the brand new scope on the Barrett 50. Cal! Gives you a totalling range of 400 and an accuracy of 450. Who wouldn't want that?

Tips

 * Like all other scopes, your camera will move slightly to the left when zoomed in.
 * Due to the high recoil, don't shoot as quickly as possbile to kill high health zombies like the Ticker.

Trivia

 * Even though it gives the same stats as the Viper, it costs much more.
 * Currently the most expensive Attachment so far.
 * Fourth Scope attachment available for R2DA.