Police were called at 11.23pm on Sunday, 11 July following reports of a shooting on Hillside, NW10.
Officers attended with London Ambulance Service paramedics. A 23-year-old man was found with gunshot wounds and was taken to a west London hospital.
His injuries have since been assessed as non-life changing.
At this early stage there have been no arrests, but an investigation is under way.
Anyone with information should call 101, providing the reference 7935/11JUL.
Information can also be provided to Crimestoppers, anonymously, by calling 0800 555 111.