Pyros (bomb)

The Pyros, previously referred to as the Small Tactical Munition (STM), is a weapon developed by Raytheon, designed to be used by UAVs.

Raytheon successfully conducted flight tests in October 2010, and it may be used to arm the AAI RQ-7 Shadow. It weighs 13 lbs, and originally had a 7 lbs warhead. On April 18, 2011, Raytheon successfully tested a new 5 lbs warhead. Though lighter, the new warhead had a significantly improved blast-fragment capability.

In July 2012, Raytheon claimed the STM could be "months" away from fielding. In early August 2012, Raytheon renamed the munition Pyros and completed the first end-to-end test of the bomb. The test validated the weapon's guidance modes, height-of-burst sensor, electronic safe and arm device, and multi-effects warhead.