The Fast Mag Gen II has been improved from the original design with a reduced width to allow for multiple units in a single PALS column. The friction retention pads have been redesigned and thickened for improved magazine retention. Angled tabs on the top provide a better grip and easier magazine extraction. An adjustable tension band has replaced the rubber band. There is now a drain hole and belt-mounted version without stabilizer tabs. The Gen II addresses issues identified in the original Fast Mag while retaining features like compatibility with standard magazines and reduced IR signature.