A chest pack holster can include a pocket designed to receive at least part of a handgun body of a handgun. The chest pack holster can include strap fasteners that are designed to fasten the chest pack holster to securing straps of a chest pack (such as side straps and/or shoulder straps). At least part of the chest pack holster can be positioned between a pack body of the chest pack and a wearer of the chest pack. The securing straps of the chest pack can be designed to extend around a torso of the wearer of the chest pack to assist in securing the chest pack to the wearer of the chest pack.