The The Butcher's AK/CAR Mod Pack Add-on for PAYDAY 2 has 8 achievements.
In the Jewelry store job, don't let the cops enter the jewelry store until the van comes back on the OVERKILL difficulty or above. Unlocks the "DMR Kit AMR-16" and the "L5 Magazine" for the CAR weapon family, "Vincent" mask, "Feathers" material and "Dinosaur Scars" pattern.