|Small Tactical Munition|
|Place of origin||USA|
|Weight||13 pounds (5.9 kg)|
|Length||55 centimetres (22 in)|
|Dual-mode seeker: semi-active laser guidance plus GPS-INS|
It weighs 13 pounds (5.9 kg), and originally had a 7 lb (3.2 kg) warhead. On April 18, 2011, Raytheon successfully tested a new 5 lb (2.3 kg) 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.
On 18 July 2014, Raytheon conducted the first live-fire test of the Pyros. The munition targeted a simulated group of insurgents planting a roadside bomb and used its height-of-burst sensor to detonate several feet above the ground. Dropped from an altitude of 10,000 feet (3,000 m), the Pyros takes 35-40 seconds to reach the ground.
- "STM / Small Tactical Munition". Retrieved 2010-12-19.
- "Raytheon tests Small Tactical Munition for UAV’s". Frontier India Defense News. Retrieved 2010-12-19.
- "AUVSI: Raytheon designing UAV-specific weapons". Retrieved 2010-12-19.
- "USMC seeks to arm Shadow, fast and without US Army help". Retrieved 2010-12-19.
- "Raytheon Company: AUSA 2010: Griffin and Small Tactical Munition". Retrieved 2010-12-19.
- New Warhead Reduces Size of Small Tactical Munition - Deagel.com, April 19, 2011
- Tiny 2-Foot Missile Could Be ‘Months’ Away From Drone War - Wired.com, July 13, 2012
- AUVSI: Raytheon completes end-to-end testing of Pyros bomb - Flightglobal.com, August 7, 2012
- Raytheon Small Tactical Munition Scores Direct Hit In First Guided Flight Test - Reuters.com, August 7, 2012
- Tiny Guided Bomb Scores a Direct Hit on Arizona Test Range - Raytheon news release, 21 August 2014
- Raytheon promotes Pyros for Middle East UAV operators - Flightglobal.com, 17 November 2013
- Pyros - Raytheon.com