These are general-purpose (GP) high explosive (HE) bombs which may use proximity, mechanical, or electric nose and tail fuzes. When used as an M117D (destructor), the M117 bomb has a fuzing system actuated by magnetic/seismic influence. Both fragmentation and blast effect are produced by these bombs.
The differences between M117A1 and M117 are as follows : the center lug; two spring washers, used for holding electrical fuzes in bomb M117 nose and base; and a ring receptacle lock, used to position electric cable assembly have been removed.
750 lb GP, M117A1E1, M117A1E2, M117A1E3, M117A2, M117A3
Iraq Ordnance Identification Guide (2004)
Afghanistan Ordnance ID Guide, Volume 1 (2004)
TM 9-1325-200, Bombs and Bomb Components (1966)