1. Unplug the nail gun.
2. Flip the lock lever in the open position. The lever is usually located at the rear of the nail gun.
3. Open the magazine's hinged door.
4. Insert the nails into the magazine with the nail heads facing down. Make sure that the nails are inserted in a single layer.
5. Lock the magazine door.
6. Push the lock lever back into the closed position. The nail gun is now ready to use.