When the stock is folded it is held together by a very basic rock solid locking system. The system uses a standard flush cup on the left side of the stock. In the butt, there is a push button on the right side behind the cheek, when it is depressed; it extends the locking mechanism out the left side of the stock. It is just a simple push of the button to close the system.
Once closed, the button sits about .250” below the surface of the stock so that it can not be accidentally depressed. The area around the button is also recessed to allow for use with gloves. To open all you need to do is give it another push. Once the stock is opened this locking mechanism retracts back into the stock so there is no protrusions to get hung up. If the system ever needs to be serviced in the field, it is a simple procedure, just remove an internal clip and put a new unit in.