A material bar magazine for guiding material bars on an automatic lathe and a system having such a magazine and automatic lathe having at least one headstock that is displaceable along a longitudinal axis of the material bar magazine, where the material bar magazine includes a material bar-guiding channel system having a channel opening system. Further, the channel system of the material bar magazine has a first, outer guide channel and a second, inner guide channel mounted inside the first guide channel such that it can move relative thereto along the longitudinal direction, the second, inner guide channel couplable or coupled to the headstock of the automatic lathe so that it synchronously moves the second, inner guide channel as the headstock moves along a longitudinal axis of the material bar magazine, relative to the first guide channel.