Mixmaster

The Mixmaster is Rancor's take at an assault rifle. It is quite high-leveled, and the most unique feature is that each round fired contains two flechettes.

Overview
The Mixmaster (or Mixy, as called by some) is a very good crowd control gun thanks to the 2 flechettes, decent pierce and high fire rate. A December 2014 patch added a damage buff that doubled normal damage and just short of doubling the version's, adding massive potential for many players. If augmented properly, the Mixmaster's damage per second is enormous, and combined with its large clip, it can make this gun one of the very best in bringing down entire hordes of zombies.

The Mixmaster can be compared to the CM 451 Starburst and Ronson 70, which appears earlier than this gun and, as a result, is harder to obtain in the long run due to how earlier levels progress more quickly than later levels. Both the Starburst and the Mixmaster are particularly heavy assault rifles, deal energy damage, have two pierce, have a huge clip size, and have shorter reload times than other assault rifles. While the Starburst doesn't require a high level for a good amount of augments, it makes it more elusive since, again, that non- Starbursts are only available at the quick early levels. The Mixmaster has a higher rounds per second as well as higher damage, giving higher damage output if one factors in a critical hit, surpassing the Starburst in those strengths. The spread and 2 flechettes of the mixmaster also allows less accuracy and better crowd control capabilities

For the concussion skill, in the first second the 1887 Shockfield is better due to larger pierce and pellet count. However in the long term, the Mixmaster's gigantic clip and devastating firing rate along with 2 flechettes, resulting in 24 flechettes per second unaugmented, can effectively render a boss immobile, even better than Hotspot as it has 2 pierce.

You should immediately augment it with Deadly, then OC. Next it's your choice - Pinpoint or Adapt, whatever you choose. Adaptive is better for Nightmare while Pinpoint fares better against bosses in normal game play.

Trivia

 * Like with several other weapons, the Mixmaster's Black version has colors other than white, grey and black. In this case, the extra color is orange.