"Armament Systems and Procedures (ASP) might not have much presence in the civilian flashlight community but it is a rather well-known brand among law enforcement professionals.
The Guardian AA DF is part of their new dual fuel (AA/14500) every day carry series of lights; whilst focusing more on tactical backup usage. With that in mind, let’s see what this new Guardian AA DF has to offer."
The Lite Review: ASP Guardian AA DF Review