Arasaka APW Mk IV

Designed as an underwater squad weapon, the Mark IV is about the size of a machine gun and has produced excel- lent results. Its clip holds 9 shots plus one in the tube, and its torps move at a shocking 1667m per turn! They cost 400 eb each and use active sonar homing, but passive sonar homing (which allows limited course correction and is hard- er to detect; -3 Awareness) can be bought for an additional +150 eb each, but reduces the maximum range to 75m. The API warhead can be switched for a cratering HEP charge (damage is 1/2 real, 1/2 stun, ignores armor and doubles SW value) for +100 eb.

Reference

 * Firestorm Stormfront (pg. 34)