Single You Out: Max Julian – Bulletproof Backpacks (ft. Conway x King Magnetic) July 14, 2018 stefanoneder . Singles . Bulletproof Backpacks, Conway, King Magnetic, Max Julian Producer Max Julian puts a little soul into this track, Bulletproof Backpacks, that features some gully bars from Conway and King Magnetic. The Machine and Magnetic prove to be a great combo over this production from Julian. Good music right here!