US Patent 10126077 Cartridge magazine loader

A loading device to allow for a quick charging of a magazine with cartridges adapted to be attached to the top of a magazine for a certain caliber of firearm with base member defining an insert portion receiving a stack of cartridges and a push member engaging the base member to force the stack of cartridges into the magazine in a singular downward movement, the loading device also receiving and storing a stack of cartridges within additional base members for quick loading of the firearm subsequent to emptying a magazine.