This is a great product. If you don't know how it works, it is like a spring loaded syringe for loading BBs into an airsoft gun magazine. You fill the reservoir with BBs, line up the hole on the bottom of the loader with the hole in your magazine and push the plunger down. Usually 4 or 5 BBs are loaded for every push. I fill 25-round pistol magazines in about 2 seconds, instead of pushing 25 BBs in one-by-one.When you are done loading, turn the loader upside-down so the BBs fall to the top of thSee full review