The M104 Auxiliary Booster consists of a booster charge of tetryl (0.5 pound) in a bakelite casing 1 foot long. It is closed at the top with a felt disc, under a threaded bakelite cap. The cap of the booster casing rests on the shoulder of the bakelite sleeve as described previously. The M104 Auxiliary Booster is also found in the tail end of the bomb body. This is true of all GP bombs except the 100 pound GP bomb and the 4,000 pound LC bomb, each of which has one auxiliary booster only. The 100 pound GP bomb is too small to use two auxiliary boosters, so that the M104 is only found in the nose of the 100 pound bomb.
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