From Halopedia, the Halo wiki
The Bullseye Pack is the fourth Downloadable content map pack for Halo 4. It includes two new maps, a new armor set, ten new achievements, and bonus content if the player has also played Halo: Spartan Assault. It was released on August 20, 2013, for $5.99 USD by itself or included as a part of the Champions Bundle.
The maps found in the Bullseye Pack were later featured in the Halo 4 component of The Master Chief Collection alongside all other map, though the Ricochet armor and exclusive skins were not, eventually making their way into the game as part of Seasons 7 and 4, respectively.
Halo: Spartan Assault Bonus Content