20120318128 | JAM RESISTANT AMMUNITION MAGAZINE - Methods and apparatus are provided for a passive locking device for preventing an ammunition belt from sliding across the top of an internal wall of an ammunition magazine used in conjunction with a belt feed weapon. In one embodiment the passive locking device is movable between a locked position in which a locking end is in close proximity to the top of the internal wall, and an unlocked position in which the locking end is spaced apart from the top of the wall. | 12-20-2012 |