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

[1][2][3] Raytheon successfully conducted flight tests in October 2010, and it may be used to arm the AAI RQ-7 Shadow.

[8] In early August 2012, Raytheon renamed the munition Pyros and completed the first end-to-end test of the bomb.

[9] The test validated the weapon's guidance modes, height-of-burst sensor, electronic safe and arm device, and multi-effects warhead.

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.