AKs make great truck guns and Armageddon Gear makes a great case for your folding stock AK truck gun. Their EDC-AK Gear Case is designed to hold an AK with a 16″ barrel and folding stock along with some essentials to support the rifle like a bandoleer and first aid gear.
The EDC-AK Gear Case has a top loading design that is very robust and presents the AK in a grip-first orientation so you can remove it from the case quickly. It also features removable shoulder straps so that it can be carried like a backpack. The straps can be packed into the lid when they are not in use. The slick exterior of the case makes it easy to move in and out of tight spaces and gives less of a clue as to what is inside.