Old School Army Meets Modern Everyday Carry The original Claymore Bag was developed by the U.S. Army to carry the M18A1 Claymore Mine, the M57 Firing Device, and the M4 Blasting Cap Assembly with a 100 foot cord. These three pieces were placed in the two large pouches at the front of the bag so that individuals could easily carry them until needed. Using that design with the two large front pockets, we updated the bag to include a slim zipper pocket in the back for notebooks or iPads, two heavy duty buckles, and an adjustable shoulder strap.