There are so many gadgets for reloading AR magazine it is almost silly. From cheap to very expensive there are tons of options. Load from stripper clips, from boxes, from loose rounds. So many options. The Maglula above, for the money, is one of the better ones and can be used to rapidly load or unload a magazine with minimal effort. There are plate loaders now that are only a few dollars more than the Maglula. Loading AR magazines is one of the simplest of magazine to load if you find a loader you like.