BB loaders are a handy device that will allows you to quickly load your mid-capacity and low-capacity airsoft magazines with ease oppose to loading each BB one by one to fill a 30 to 100 round magazine. BB loaders, or more commonly referred as speed loaders, are compatible to a variety of airsoft guns including AEG's, sniper rifles, airsoft gas pistols, and airsoft shotgun shells. Despite being traditionally loaded from a trap door, high-capacity magazines (or hi-caps) can benefit from the use of a speed loader as well allowing you to drop BBs in and avoid spills. They are inexpensive, convenient, and come in different shapes and forms resembling everything from bottles, to pistol magazines, to rifle magazines.