US Patent 7698844 Box magazine for a firearm

Rod magazine for a firearm, having a channel for holding cartridges in a stack, and having a feed for feeding the stack to a channel end which is clasped by magazine lips, which hold the top cartridge in the stack back in the channel direction, but allow its movement approximately transversely with respect to the channel direction beyond the rod magazine, with the channel being equipped with guide strips, which run in the channel direction, for the shoulders of the cartridges, and with the guide strips projecting beyond the channel end and into the movement path, which is located in front of the magazine lips, of the top cartridge.