The Lula and Maglula loaders and unloaders are military-quality rifle magazine loaders and un-loaders for magazines. They facilitate both loading of loose rounds into a magazine and unloading them out of the magazine. They do so fast, safely, comfortably, painlessly and reliably. Usable for tens of thousands rounds. These loaders/unloaders are reliable in all weather and significantly prolong the life of magazines. DOES NOT WORK WITH THE FOLLOWING MAGAZINES Wide-body mags > 1/2 inch such as any converted .22 magazines, magazines with depth > 1 1/8 inch (1.125 inch, 29mm), magazines with a projecting follower button such as Ruger MKI, MKII, MKIII and Walther P22, GLOCK 42 .380 ACP, Colt ACE .22 LR and Ruger LC380 .380 ACP. This is not an exhaustive list of what the magazine loader will not work with. Please see manufacturer's website for more details BEFORE ordering..