The Gage Historical Pack Add-on for PAYDAY 2 has 5 achievements.
Equip a Broomstick pistol with the Damper.L 44 Nozzle and the Barrel Sight 44. Unlocks the "British Bulldog" mask, "High Capacity Mag" and "Holster Stock" for the Broomstick pistol, "Army Green" material and "Filthy Thirteen" pattern.