The Magazine cover does not close on my DDF2130000?

– If there are more than 10 nails in one magazine, remove nails and re-load accordingly (capacity 10) – Remove foreign objects from the magazine – Remove any forbidden or unauthorized nails from the magazine - Only the nails produced by DEWALT are permitted for the P3X Cartridge Tool. (For technical information refer to instruction manual) – If interior parts of the device are dirty or worn - please refer to - How do I Inspect and Clean my DDF2130000? FAQ – If there is a faulty feeding spring mechanism in the magazine the magazine will need to be replaced.