The Law Enforcement and Military technology development communities have a growing common interest in the technologies associated with gunshot detection and localization. These common interests include urban warfare, community-oriented policing and sniper location. Technologies of interest include those associated with muzzle blast and bullet shockwave detection and the inter-netting of these acoustic sensors with electro-optic sensors. To date, no one sensor technology has proven totally effective for a complete solution. PSI has a muzzle blast detection and localization product which is wireless, highly mobile and reconfigurable, with a user-friendly laptop processor and display unit, which is currently being demonstrated in two different implementations: 1) A one-year, and on-going urban gunshot detection system installed in Austin, Texas, that began July 2001; and 2) A counter sniper system demonstration conducted at both the Aberdeen Proving Grounds and at an Israeli Defense Force firing range in the second half of the year in 2001. The former topic is under the auspices of a National Institute of Justice Cooperative Agreement with PSI and the Austin Police Department, and the latter topic was managed by the Army Research Laboratory and co-funded by DARPA/ATO and PSI. This paper will discuss successful aspects of the demonstrations to date, operational conclusions, and the development directions indicated for the future.