M18 Claymore
http://www.adtdl.army.mil/cgi-bin/atdl.dll/fm/23-23/toc.htm
The M18 Claymore, a directional fragmentation mine, is 8-1/2 inches long, 1-3/8 inches wide, 3-1/4 inches high, and weighs 3-1/2 pounds. The mine contains 700 steel spheres (10.5 grains) and 1-1/2 pound layer of...