AR-15/M4/M16 Speed Loader works with metal and polymer magazines. Magazines will securely lock into Speed Loader with the integrated magazine catch. Speed Loader works with GI 10 round stripper clips or you can load 10 loose rounds into the side tray that opens up for easy access. Side tray door is secured with a spring loaded latch. The T-handle push rod has several features: a magnet on the T-handle retains the empty stripper clip for easy removal, the end of T-handle push rod will also strip the cartridges from the feed lips of a loaded magazine, it has a 1/4" tool bit holder molded into the handle, the handle is tethered to the Speed Loader body with a blue lanyard. Speed Loader is constructed of polymer and aluminum