The backpack includes a pin that extends from a first frame. The first frame supports a bag or equipment that is carried by an end user. The backpack also includes a second frame that is worn by the end user. The second frame has a spring biased lock rod that moves between a lock position and a release position. In the lock position the rod engages the pin and attaches the first frame to the second frame. The lock rod is attached to a cord which can be pulled to move the rod to the release position. To release the backpack, the end user pulls the cord to disengage the lock rod from the pin. The pin is then separated from the rod to release the first frame from the second frame. The backpack can be re-attached by inserting the pin with the spring biased lock rod.