BBC NEWS | Americas | US military unveils heat-ray gun
he prototype weapon - called Silent Guardian - was demonstrated at the Moody Air Force Base in Georgia.
HEAT-RAY WEAPON
US troops scatter after begin hit by the beam
Directs a high energy beam
Range of up to 500m
Penetrates clothes but not walls
Heats but reportedly does not harm[/quote]
Well this seems like an actually good idea for a defensive weapon.