Compatible with most steel or aluminum AR-10 magazines, the Maglula® AR-10 Gen II .308/7.62x51 Lula® Magazine Loader and Unloader offers easy, pain-free loading and unloading of .308/7.62x51 ammunition. The simple, spring-action lever loads/unloads one round at a time without tearing up your thumb or damaging your magazine’s feed lips, while the impact-resistant, combat-tested polymer body offers reliable performance in virtually any environment.